Update screenshots with short alt text (github#37829)

Author: isaacmbrown

content/account-and-profile/setting-up-and-managing-your-github-profile/customizing-your-profile/about-your-profile.md

@@ -21,7 +21,7 @@ You can add personal information about yourself in your bio, like previous place
 
 {% data reusables.profile.profile-readme %}
 
-![Profile README file displayed on profile.](/assets/images/help/repository/profile-with-readme.png)
+![Screenshot of the profile page for @octocato. In the top-right corner, a profile README greets the viewer and lists information about the user's work.](/assets/images/help/repository/profile-with-readme.png)
 
 {% endif %}
 

content/account-and-profile/setting-up-and-managing-your-github-profile/managing-contribution-settings-on-your-profile/sending-enterprise-contributions-to-your-githubcom-profile.md

@@ -45,7 +45,7 @@ Before you can connect your {% ifversion fpt or ghec %}{% data variables.product
 
 1. Sign in to {% data variables.product.prodname_ghe_server %} and {% data variables.product.prodname_dotcom_the_website %}.
 1. On {% data variables.product.prodname_ghe_server %}, in the upper-right corner of any page, click your profile photo, then click **Settings**.
-   ![Settings icon in the user bar.](/assets/images/help/settings/userbar-account-settings.png)
+   ![Screenshot of {% data variables.product.prodname_dotcom %}'s account menu showing options for users to view and edit their profile, content, and settings. The menu item "Settings" is outlined in dark orange.](/assets/images/help/settings/userbar-account-settings.png)
 {% data reusables.github-connect.github-connect-tab-user-settings %}
 {% data reusables.github-connect.connect-dotcom-and-enterprise %}
 1. Review the resources that {% data variables.product.prodname_ghe_server %} will access from your {% data variables.product.prodname_dotcom_the_website %} account, then click **Authorize**.
@@ -55,7 +55,7 @@ Before you can connect your {% ifversion fpt or ghec %}{% data variables.product
 
 1. Sign in to {% data variables.product.prodname_ghe_managed %} and {% data variables.product.prodname_dotcom_the_website %}.
 1. On {% data variables.product.prodname_ghe_managed %}, in the upper-right corner of any page, click your profile photo, then click **Settings**.
-   ![Settings icon in the user bar.](/assets/images/help/settings/userbar-account-settings.png)
+   ![Screenshot of {% data variables.product.prodname_dotcom %}'s account menu showing options for users to view and edit their profile, content, and settings. The menu item "Settings" is outlined in dark orange.](/assets/images/help/settings/userbar-account-settings.png)
 {% data reusables.github-connect.github-connect-tab-user-settings %}
 {% data reusables.github-connect.connect-dotcom-and-enterprise %}
 {% data reusables.github-connect.authorize-connection %}

content/actions/deployment/protecting-deployments/creating-custom-deployment-protection-rules.md

@@ -37,11 +37,11 @@ Alternatively, you can write your own protection rules for any of the above use
    1. Optionally, in the **Callback URL** text field under "Identifying and authorizing users," enter the callback URL. For more information, see "[AUTOTITLE](/apps/creating-github-apps/creating-github-apps/about-the-user-authorization-callback-url)."
    1. Under "Permissions," select **Repository permissions**.
    1. To the right of "Actions," click the drop down menu and select **Access: Read-only**.
-   ![A screenshot of the "Repository permissions" section when creating a new GitHub App. The button to configure permissions, with the "read-only" permission selected, for Actions is highlighted by a dark orange rectangle.](/assets/images/help/actions/actions-repo-permissions-read-only.png)
+   ![Screenshot of the "Repository permissions" section when creating a new GitHub App. The button to configure permissions, with the "read-only" permission selected, for Actions is highlighted by a dark orange rectangle.](/assets/images/help/actions/actions-repo-permissions-read-only.png)
    1. To the right of "Deployments," click the drop down menu and select **Access: Read and write**.
-   ![A screenshot of the "Deployments" permission settings in the "Repository permissions" section while creating a new GitHub App. The button to configure permissions, with the "read-only" permission selected, for Deployments is highlighted by a dark orange rectangle.](/assets/images/help/actions/actions-deployments-repo-permissions-read-and-write.png)
+   ![Screenshot of the "Deployments" permission settings in the "Repository permissions" section while creating a new GitHub App. The button to configure permissions, with the "read-only" permission selected, for Deployments is highlighted by a dark orange rectangle.](/assets/images/help/actions/actions-deployments-repo-permissions-read-and-write.png)
    1. Under "Subscribe to events," select **Deployment protection rule**.
-   ![A screenshot of the "Subscribe to events section" section while creating a new GitHub App. The checkbox to subscribe to the deployment protection rule event is highlighted by a dark orange rectangle.](/assets/images/help/actions/actions-subscribe-to-events-deployment-protection-rules.png)
+   ![Screenshot of the "Subscribe to events section" section while creating a new GitHub App. The checkbox to subscribe to the deployment protection rule event is highlighted by a dark orange rectangle.](/assets/images/help/actions/actions-subscribe-to-events-deployment-protection-rules.png)
 
 1. Install the custom deployment protection rule in your repositories and enable it for use. For more information, see "[AUTOTITLE](/actions/deployment/protecting-deployments/configuring-custom-deployment-protection-rules)."
 

content/actions/quickstart.md

@@ -53,7 +53,7 @@ The following example shows you how {% data variables.product.prodname_actions %
    ```
 1. Scroll to the bottom of the page and select **Create a new branch for this commit and start a pull request**. Then, to create a pull request, click **Propose new file**.
 
-   ![Screenshot of the "Commit new file area" of the page.](/assets/images/help/repository/actions-quickstart-commit-new-file.png)
+   ![Screenshot of the "Commit new file" area of the page.](/assets/images/help/repository/actions-quickstart-commit-new-file.png)
 
 Committing the workflow file to a branch in your repository triggers the `push` event and runs your workflow.
 

content/actions/using-github-hosted-runners/connecting-to-a-private-network.md

@@ -27,7 +27,7 @@ With {% data variables.product.prodname_actions %}, you can use OpenID Connect (
 
 The following diagram gives an overview of this solution's architecture:
 
-![A diagram of an OIDC gateway architecture, starting with a {% data variables.product.prodname_actions %} runner and ending with a private network's private service.](/assets/images/help/actions/actions-oidc-gateway.png)
+![Diagram of an OIDC gateway architecture, starting with a {% data variables.product.prodname_actions %} runner and ending with a private network's private service.](/assets/images/help/actions/actions-oidc-gateway.png)
 
 It's important that you authenticate not just that the OIDC token came from {% data variables.product.prodname_actions %}, but that it came specifically from your expected workflows, so that other {% data variables.product.prodname_actions %} users aren't able to access services in your private network. You can use OIDC claims to create these conditions. For more information, see "[AUTOTITLE](/actions/deployment/security-hardening-your-deployments/about-security-hardening-with-openid-connect#defining-trust-conditions-on-cloud-roles-using-oidc-claims)."
 

content/admin/identity-and-access-management/using-enterprise-managed-users-for-iam/configuring-scim-provisioning-for-enterprise-managed-users.md

@@ -50,7 +50,7 @@ To configure provisioning for your {% data variables.enterprise.prodname_emu_ent
 1. Under **Note**, give your token a descriptive name.
 2. Select the **Expiration** dropdown menu, then click **No expiration**.
 3. Select the **admin:enterprise** scope.
-   ![Screenshot showing the admin:enterprise scope.](/assets/images/help/enterprises/enterprise-pat-scope.png)
+   ![Screenshot of a list of scopes with checkboxes. The "admin:enterprise" scope, accompanied by the text "Full control of enterprises," is selected and highlighted with an orange outline.](/assets/images/help/enterprises/enterprise-pat-scope.png)
 4. Click **Generate token**.
 5. To copy the token to your clipboard, click {% octicon "copy" aria-label="Copy token" %}.
 

content/admin/user-management/managing-users-in-your-enterprise/viewing-people-in-your-enterprise.md

@@ -160,7 +160,7 @@ You can view a list of all dormant users {% ifversion ghes or ghae %} who have n
 
    ![Screenshot of the tabs above an organization name. The "People" tab is highlighted with an orange outline.](/assets/images/help/enterprises/emu-organization-people-tab.png)
 4. Above the list of members, click **Type**, then select the type of members you want to view.
-   ![Screenshot of the "Type" button.](/assets/images/help/enterprises/filter-by-member-type.png)
+   ![Screenshot of the list of members. A dropdown menu labeled "Type" is outlined in orange, and an expanded dropdown shows options for "All members," "Managed by IdP groups," and "Managed directly."](/assets/images/help/enterprises/filter-by-member-type.png)
 
 {% endif %}
 

content/apps/publishing-apps-to-github-marketplace/creating-apps-for-github-marketplace/viewing-transactions-for-your-listing.md

@@ -38,7 +38,7 @@ You can view or download the transaction data to keep track of your subscription
 - **region:** The name of the region present in billing address.
 - **postal_code:** The postal code value present in billing address.
 
-![Screenshot of the {% data variables.product.prodname_marketplace %} Insights.](/assets/images/marketplace/marketplace-transactions.png)
+![Screenshot of the "Transactions" tab in the {% data variables.product.prodname_marketplace %} listing for an app. Transactions from the past week are listed in a table layout, with a search bar labeled "Search this file...".](/assets/images/marketplace/marketplace-transactions.png)
 
 ## Accessing {% data variables.product.prodname_marketplace %} transactions
 

content/apps/publishing-apps-to-github-marketplace/listing-an-app-on-github-marketplace/drafting-a-listing-for-your-app.md

@@ -50,7 +50,7 @@ To create a {% data variables.product.prodname_marketplace %} listing:
 {% data reusables.user-settings.edit_marketplace_listing %}
 5. Once you've created a new draft listing, you'll see an overview of the sections that you'll need to visit before your {% data variables.product.prodname_marketplace %} listing will be complete.
 
-   ![Screenshot of a {% data variables.product.prodname_marketplace %} listing.](/assets/images/marketplace/marketplace-listing-overview.png)
+   ![Screenshot of a draft {% data variables.product.prodname_marketplace %} listing. In a section labeled "Publish your app to Marketplace," unfinished action items such as "Add your contact info" are marked with orange circles.](/assets/images/marketplace/marketplace-listing-overview.png)
 
 {% note %}
 

content/apps/publishing-apps-to-github-marketplace/listing-an-app-on-github-marketplace/writing-a-listing-description-for-your-app.md

@@ -110,7 +110,7 @@ If your app only works with specific languages, select up to 10 programming lang
 
 A feature card consists of your app's logo, name, and a custom background image that captures your brand personality. {% data variables.product.prodname_marketplace %} displays this card if your app is one of the four randomly featured apps at the top of the [homepage](https://github.com/marketplace). Each app's very short description is displayed below its feature card.
 
-![Screenshot of the feature card.](/assets/images/marketplace/marketplace-feature-card.png)
+![Screenshot of a feature card for OctocatApp. The app's name and an icon of Mona are displayed on a pink background, above the description "United we code."](/assets/images/marketplace/marketplace-feature-card.png)
 
 As you upload images and select colors, your {% data variables.product.prodname_marketplace %} draft listing will display a preview of your logo and feature card.