Selection of cells act like a SLOTH
In previous version of Microsoft, when we used to select multiple cells, it used to select instantly. But now in 2016 version it act like a SLOTH. It reacts slowly and that does bothers me because it always lags when we are really working fast. Pl make it feel like previous version.
SEUMAS MACLAREN commented
There is something wrong with your set-up if you are working offline. Get it checked and consider machine local resources and scanning activity of anti-malware, and other Office processes also active including updates. However, if you are working online on a sharepoint (shared document) you may see some delays to animation (I have seen this in Word, but not Excel yet).