Hi Whitbyro and welcome to the RH community.
Unfortunately I'm not sure you can change the tooltip text as I suspect they are hardcoded. You may be able to edit the webhelp output files but as this is not really my territory I'll leave it up to someone else who produced webhelp to chime in here.
Read the RoboColum(n) for mutterings on RoboHelp, Technical Communication Suite and technical communication.
Welcome to the forums.
Are you working with a localized version of your project? You can change the project language by going to File > Project Settings and selecting the language. When you generate your single source layout, the corresponding translations will be used in the buttons and tooltips.
To do that you need to edit the LNG file.
To edit the LNG file:
Click File > Project Settings.
From the General tab, click the Advanced button.
From the Advanced Settings for Localization dialog click the LNG file tab.
Scan the long list of items and you will find where the tooltips exist.
I think in this case it's listed in the [Common] section.
Change to Contents=Contentu
thank you - it worked perfectly!