Great news—you absolutely can configure Eclipse ADT to show the client number in your editor tab labels, which will eliminate that frustrating confusion between your dev (100) and test (200) clients. Here's a step-by-step guide to set it up:

• First, open Eclipse's preferences: On Windows/Linux, click Window > Preferences; on macOS, go to Eclipse > Settings.
• Navigate to the SAP ABAP Development settings: Expand the ABAP Development section, then select Editors.
• Locate the Editor Tabs subsection (it’s prominently placed on the Editors settings page).
• Check the box labeled "Show client in editor tab" (wording might vary slightly by ADT version, but it’ll explicitly reference the client number).
• Click Apply then OK to save your changes.

Once applied, your editor tabs will automatically update to include the client number alongside the system ID and object details—exactly the format you wanted: [D10 - 100] Z_WEB_COMPONENT | COMPONENTCONTROLLER or [D10 - 200] Z_WEB_COMPONENT | COMPONENTCONTROLLER.

A quick heads-up: If you don’t see this option immediately, make sure your ADT plugin is up to date. Older versions might not have this feature enabled by default. You can check for updates via Help > Check for Updates.

内容的提问来源于stack exchange，提问作者Sasku