Thanks for trying out EmEditor 10 beta!
1. I reproduced the current line coloring bug. It is going to be fixed on the next beta. Thanks for reporting this bug.
2. The macro’s recording will not work when vertical mode is on. Currently, this is the specification. As you can imagine, the macro’s recording becomes complicated when vertical mode is on.
3. You can find Overwrite/Insert mode by this code:
b = document.selection.OverwriteMode;
Sticky vertical mode can be found by:
editor.QueryStatusByID( 4473 ); // 4473 VerticalMode
Please let me know if you have any other questions. Thanks again!