Edit Window - Not responding

Trying to edit a 1200 high sliding/gliding window to 1800 high. I hit submit and Outliner tray starts flashing for 30 secs, plusspec goes into not responding and just hangs. re-start sketchup. repeat. happens again

Good day Henderson,

Would I be able to get you to go to top left handside of SketchUp to Window > Default Tray > Outliner.
Would you be able to untick this option, this will help with the lag you are experiencing.