Hello,
In complement to Daniel\'s answer about the \"Selected train marker\":
From CATrain 2.2.1, this option is saved in the \"tci\" file. Therefore, if you enable this option and you save your layout file, it will still be enabled at next opening.
Moreover, the feature works in both ways:
- when you set the mouse cursor on a throttle control the cyan circle will be moved over the corresponding train, and:
- when you Right Click on a loco, a dialog box will pop-up and the cyan \"led\" will light on the corresponding throttle control.

Joël