this is silly but is there a way to change background color of dimension title like it is shown in attachment?
First enable the option Always Show Design Menu Items on the Design tab of the user preferences window.
Then right click in the chart the cell you want to customize and choose Custom Format Cell.
There is a option for custom formatting. Right Click on Straight Table Chart, you will find the option
would you be so kind to show me how?
The option to change background color in dimension, only changes the color of data, not the title.
Check the below link,
Custom formatting table cells - The Qlik Fix! The Qlik Fix!
Changing color for individual column header in a straight table
Try like this
1. Press Ctrl + G to enable Design Grid
2. Now right click the mouse on the header and select Custom Format Cell & apply the styles.
Retrieving data ...