Let's make sure issue is not already fixed in latest builds first.

• I verified I can reproduce this issue against latest Integration Build of Eclipse SDK

Steps to reproduce

From a fresh installation and clean workspace:

1. Create two or more projects
2. In Project Explorer, click on a project
3. Click on "Edit" menu: the "Select All" item is disabled (it should be enabled), and CTRL+A has no effect (it should select all projects)
4. In Project Explorer, click on another project (or click again on the same project)
5. Click again on the "Edit" menu: the "Select All" item is enabled, and CTRL+A works as expected (but it should have worked at step 2)

Tested under this environment:

• OS & version: Windows 10
• Eclipse IDE/Platform version (as shown in Help > About): Eclipse IDE for Enterprise Java and Web Developers (includes Incubating components)
  Version: 2024-12 (4.34.0)
  Build id: 20241128-0757

Community

• I understand reporting an issue to this OSS project does not mandate anyone to fix it. Other contributors may consider the issue, or not, at their own convenience. The most efficient way to get it fixed is that I fix it myself and contribute it back as a good quality patch to the project.