You can put a list of groups on your toolbar or in a menu by entering Customize mode and dragging Commands - Settings - Folder Tab Group List to your toolbar or a sub-menu.
If you put it in a menu then you can use Alt and the underlined letter in the menu's name to pop it open.
If you want to make some hotkeys which each open a different tab group then you can do this as well. Just create a standalone hotkey (via Customize -> Keys), or a toolbar button with a hotkey, and give it a command like this:
Go TABGROUPLOAD="Test"
Where Test is the name of the group you want the hotkey to load.
Excellent, this is what I was looking for. Works great.
Small issue: The associated command is Prefs PAGE=settings,2 which means: I included it into the main menu and have the i-character underlined. Pressing Alt-i now opens the preference dialog box with the groups inside. I understand what happens but I was hoping that the menu would pull down and Icould use key down to select the group I need.
Getting the drop down is working OK using the mouse and clicking the smalll arrow next to the text in the main menu.
I'm sure there is another small hint on how to get this done.
Oh, sorry, I didn't realise quite what the pre-made button you I told you to use would create.
It's a Menu-Button. The main button part opens the Preferences dialog, as you've seen, but if you click the arrow to the right of the button then you'll open up a menu which lists your Tab Groups.
In Customize mode, you can open the menu up and drag the thing out of it in order to put the list of groups somewhere else (e.g. in a normal menu that you can open using Alt and a letter).
The thing in the menu part is a placeholder button which runs the command Go TABGROUPLIST -- outside of Customize mode that button will turn into a list of tab groups.