error in "enlarge current viewport" function

[PumpMaster]

hello everybody, i am having some trouble with the "enlarge current viewport" function of my level editor. i can enlarge the "front", "right", and "top" viewports fine, but it doesn't work with the "perspective" viewport. this viewport is the most important one and the one everyone uses most when working with the editor, so i need to get this to work before i can resume work with the editor. any advice on how to fix this?
thanks!

[Your Computer]

The mouseover detection of the level editor is a bit buggy. Clicking on the viewport you want to enlarge and hovering over again and pressing the space bar tends to get it working for me again.

[PumpMaster]

oh, it knows which viewport to do. it just glitches up when i press the space bar...

[PumpMaster]

ill send pictures of what happens. perhaps a senior member of the forum will be able to help