How do I delete the dots every 3rd line?

[abi]

Calc ver.4
win 8.1, English
I have tiny dots, every 3 line, ~mid-cell … ?

[mariosv]

Please, can explain with more detail? Are you talking about lines in the same cell or every three rows?

[horst]

You might have activated the grid. Menu>Options> LibreOffice Calc>Grid. Look if "Grid visible"is checked.