When you goto Tools->Screen object, you cannot see ‘Bitmap Category’ field because it is HIDDEN in tools for a normal view. You need to enable it from Tools CFG.
Here are steps -

1. Open your Tools.cfg.
2. Search for “ClientConfigurationMode”, it might be there with value like
ClientConfigurationMode = Web
3. If you find it or did’t find it, just add/replace below value to the [Siebel] section of CFG. This is the first section of CFG.
ClientConfigurationMode = All
4. Relaunch your Tools. This will show certain hidden …