more image descriptions

Author: paladique

docs/contributing/making-changes-to-a-pull-request.md

@@ -6,7 +6,7 @@ When a topic branch is [checked out](review-a-pull-request-in-visual-studio.md),
 
 If a Pull Request is checked out and the author adds new commits to the branch, then the option will be given to pull the changes locally. This works both for pull requests from the same repository and from a fork.
 
-![](images/pr-pull-changes.png)
+![Pulling changes by clicking the pull link button](images/pr-pull-changes.png)
 
 ## Pushing changes
 

docs/contributing/publishing-an-existing-project-to-github.md

@@ -2,13 +2,13 @@
 
 1. Open a solution in Visual Studio.
 2. If solution is not already initialized as a Git repository, select **Add to Source Control** from the **File** menu.
-![Add to Source Control](images/add-to-source-control.png)
+![Location of Add to Source Control option in the file menu](images/add-to-source-control.png)
 3. Open **Team Explorer**.
-![Open Team Explorer](images/open-team-explorer.png)
+![Location of Team Explorer option in the view menu](images/open-team-explorer.png)
 4. In Team Explorer, click **Sync**.
-![Sync](images/team-explorer-sync.png)
+![Location of the sync button in the Team Explorer pane](images/team-explorer-sync.png)
 5. Click the **Publish to GitHub** button.
-![Publish to GitHub](images/publish-to-github.png)
+![Location of the Publish to GitHub button in the Team Explorer pane](images/publish-to-github.png)
 6. Enter a name and description for the repository on GitHub.
 7. Check the **Private Repository** box if you want to upload the repository as a private repository on GitHub. You must have a [Developer, Team or Business account](https://github.com/pricing) to create private repositories.
 8. Click the **Publish** button.

docs/contributing/reviewing-a-pull-request-in-visual-studio.md

@@ -6,21 +6,21 @@ GitHub for Visual Studio provides facilities for reviewing a pull request direct
 
 2. Open **Team Explorer** and click the **Pull Requests** button to open the **GitHub** pane.
 
-   ![image](images/pull-requests-button.png)
+   ![Pull Requests button in the Team Explorer pane](images/pull-requests-button.png)
 
 3. Click the title of the pull request to be reviewed.
 
 ## Viewing a pull request
 
 The Pull Request Details view shows the current state of the pull request, including information about who created the pull request, the source and target branch, and the files changed.
 
-![image](images/pr-details.png)
+![The details of a single pull request in the GitHub pane](images/pr-details.png)
 
 ## Checking out a pull request
 
 To check out the pull request branch, click the **Checkout [branch]** link where [branch] is the name of the branch that will be checked out.
 
-![image](images/pr-details-checkout-link.png)
+![Location of the checkout link in the GitHub pull request details page](images/pr-details-checkout-link.png)
 
 If the pull request is from a fork then a remote will be added to the forked repository and the branch checked out locally. This remote will automatically be cleaned up when the local branch is deleted.
 
@@ -30,6 +30,6 @@ If the pull request is from a fork then a remote will be added to the forked rep
 
 To compare the contents of a file in the pull request with its content on the target branch, double click a file in the **Changed Files** tree. This will open the Visual Studio diff viewer. If the pull request has been checked out, the right hand pane will be editable.
 
-![image](images/pr-diff-files.png)
+![Diff of two files in the Visual Studio diff viewer](images/pr-diff-files.png)
 
 If the pull request is checked out, right clicking on a file on the **Changed Files** tree and selecting **Open File** will open the file for editing in Visual Studio.

docs/contributing/using-the-github-toolbar.md

@@ -2,7 +2,7 @@
 
 The GitHub pane toolbar provides a way to navigate between views, refresh views, and open the current view on GitHub.
 
-![Toolbar](images/github-pane-toolbar.png)
+![The GitHub pane toolbar](images/github-pane-toolbar.png)
 
 1. Open a solution in a GitHub repository.
 2. Open **Team Explorer** and click the **Pull Requests** button to open the **GitHub** pane.

docs/contributing/viewing-code-on-github.md

@@ -9,7 +9,7 @@ GitHub for Visual Studio enables easy navigation to code that exists on GitHub d
 
 ## Viewing the selected code on GitHub
 1. Right click and select **Open on GitHub** from the **GitHub** submenu.
-![Open on GitHub](images/open-on-github.png)
+![Open on GitHub selection in the GitHub context submenu](images/open-on-github.png)
 2. Your browser will open and navigate to the code on GitHub.
 
 ## Copying the URL of the selected code's location on GitHub

docs/contributing/viewing-the-pull-requests-for-a-repository.md

@@ -5,9 +5,9 @@ GitHub for Visual Studio exposes the pull requests for the current repository an
 1. [Sign in](authenticating-to-github) to GitHub.
 2. Open a solution in a GitHub repository.
 3. Open **Team Explorer** and click the **Pull Requests** button to open the **GitHub** pane.
-![Pull Requests](images/pull-requests-button2.png)
+![Pull Requests button in the Team Explorer pane](images/pull-requests-button2.png)
 4. The open pull requests will be displayed.
-![Open Pull Requests](images/pull-request-list.png)
+![Pull requests in the GitHub pane](images/pull-request-list.png)
 5. Change the Open/Closed filter by clicking the **Open** link and selecting the filter you want to use from the dropdown.
 6. Filter pull requests by Assignee by clicking the **Assignee** link and selecting the assignee you want to view from the dropdown.
 7. Filter pull requests by Author by clicking the **Author** link and selecting the author you want to view from the dropdown.