Hi I am using Libreoffice v5.4.2.2 on a win 7 PC. In Writer when I make a tab like in a table of context & I use a fill character it is always shaed gray how can I turn the off

Hi I am using Libreoffice v5.4.2.2 on a win 7 PC. In Writer when I make a tab like in a table of context & I use a fill character it is always shaed gray how can I turn the off.

View - Field shadings