Allow selection tool to choose Roll and Ripple trims without modifier key
Under Preferences / Trim, what does the "Allow selection tool to choose Roll and Ripple trims without modifier key" option do?
I couldn't find any documentation on helpx.adobe.com about it:
https://helpx.adobe.com/premiere-pro/user-guide.html/premiere-pro/using/preferences.ug.html

or Roll Edit
. It you want the Trim Tool
you need the modifier (ctrl).