today I opened a large Rhino 5 file from my client. My first step was to try to open the Rhino properties. I have a button with the commands _DocumentPropertiesPage _Render. I pressed the button and in this moment some meshes are shown and Rhino 6 freezed for some time. After a while the properties UI popup, but Rhino is still not responsive, every click cause a waiting time of several seconds. After a few minutes I got my mesh settings edited and I leave the UI. Now, Rhino runs like expected again.
I ask me, why is the mesh shown and could it cause the slow down?