Have you tried changing the height of the group that contains the buttons? Click on the group border, right-click, select Position and Size, and change the Height to something like 1500 to test...

As a possible workaround, if that doesn't work, wondering if you were able to make the buttons smaller if you could add more buttons to the current view?
I have some steps out there within this
post (and this
deck). Use the following text for the button vs. what you have, and then update the action button to point to your report:
<font size=3><b>TBM Views</b> - analyze areas of IT spend<img src='biit/icons/glyphs/48x48/arrow_orange.png'><br>
#CostingStandard(CT-Foundation)