office spreadsheet

[pete1977x]

when you want to sum a column in the spreadsheet and you highlight some cells you get a blinking effect on the boxes. Then you clik again and get a blue box effect on the cells.
Is there a setting that makes it do the blue highlighting from the start..??

[vasa1]

I have LibreOffice 5.2.3.2 Build ID: 1:5.2.3~rc2-0ubuntu1~xenial1. I don't see any blinking effect when I highlight cells prior to summing them. I've attached a small screen recording video as a compressed file. If you wish, download the file and uncompress it to view the video.

[pete1977x]

mine blinks first around the highlighted cells...... someone knows what I mean..