I anticipate this feature will be included soon. I post this in the small chance that it's gone unnoticed.
When customizing presets, it's common to re-title slots. Presently, standard text commands don't work. Double-clicking on a slot opens the whole text field, but double-clicking beyond that does not choose a word within the slot. And a more common frustration is trying to cursor to letters left and right with the arrow keys -- this only adjusts the view of the overall window.
Also, it'd be nice if, once the text field is highlighted, a right-click opened a copy/paste option (though command C, V and X do work).
These text commonalities are found everywhere else in VSL products. I'm sure it's on the "things to do" list with Synchron slots. Thanks.