Once inserted, a Title Block is just a symbol and can be re-sized in the same way; in the Properties Grid change Handle Behavior from the default value of 'Move' to 'Resize'.

But, it should never be necessary to resize a Title Block.  The Title Block should be added to a completed drawing at which time it will size itself to fit the drawing.  If you need to make changes to the drawing that change its size, delete and re-insert the Title Block (or just insert the Title Block again; the existing Title Block will be replaced by the new one).

I hope this is helpful.

Kind regards,
Rob Robinson
Stardraw.com

It would be nice if there was a [CustomProject/Reference] and a [CustomDrawing/Reference] that could be added where we can set our own. I feel like if you are to add a bunch then many people would just have garbage fields, and many would not have quite what they are looking for.