Hello,
many thanks for help. Fortunately I have found what causes the problem. It is "layer" toolbars visible. If I hide it everything worsk fine. If I add Layer toolbar at toolbar section above immediately I wait for tens second to get text modified.
Because I also use and need layer toolbar I would like to ask you how to resolve the problem.

Hello,
many thanks for the fast feedback. I am using Lenovo T520:

• i7-2760 2,4Ghz
• Intel(R) HD Graphics 3000
  and
• NVIDIA Quatro 1000M

Same time ago it worked fast enough. At least for not so large projects.

Hello,
I used to use 2D tools regularly, especially 2D text. Since I have completely reinstalled PC, installed Sketchup v.17.2.555 64-bit the function "Edit text" is very slow. If change the text in the
pop-up window and hit ENTER, sometimes I wait even for one minute. This happens even the project is empty. Can you help me how to solve the issue please? In the past modifying text was getting slow when the project grows but not empty. Many thanks