There are very unpleasant bug. Confirmed by 3 more people on different computers.
The bug
-Go to Options > Preferences > Mouse modifiers
-Choose Context: Media item > left click
-Search "Shift" modifier
-Choose in Behavior instead defalt - Action list
-Make "NEW" custom action
-Search & Drag as action "Item: Select item under mouse cursor (leaving other items selected)"
-Give name for action: BUG TEST
-Press OK > Select > Apply > Ok
-Try to make Multi-Selection of items with Left click +Shift
-See how it does not work )
Default action for Left click+Shift on item "Add a range items to selection, if already selected extend time selection" Also does not work as described. Do no extend time selection.
I need it for add some actions to standart mouse modifiers (Time selection: Set time selection to items)
To repeat some DAWs wolkflow (Ableton Protools)
What would the begin work with Reaper and not stumbling.
The mouse modifier on the / item / left click + shift / does not work if action "Item: Select item under mouse cursor (leaving other items selected)" is placed in the Custom Action. Also this action does not work for / item / left click + control
This action work fine from only from keyboard shortcut.
Here is demonstration