@dave r said:

Based on what you've given us to work with, it's impossible to identify the problem exactly. Sharing the model would be very helpful in getting you an answer.

How large is the file? Do you have a lot of large textures? Where is it saved? What graphics card and what version of the graphics drivers?

the file size doesn't exceed the 300 kb and i tried a new empty sketch up file but still the same problem..
as for my labtop spec are core i7 4510U, 8 gb ddr3 ram, nvidia graphics card gt 840m

Hey Guys..
i was working with sketch up 2017 yesterday normally and i opened it today and suddenly it began to slow in zooming and when i use the orbit tool also, that's not it also all the other tools.. no matter what i do and how many times i close re-open it, its still with the same issue and i am starting to lose my mind.. i have a submission tomorrow and i want a fast reply so please help..