How to make horizontal separation between tabs on TabContainer?

Question

in Custom Constants HSeperation doesn't work :(

Answer 1

That's because hseperation is the distance between the text and icon of a tab, see this issue. If you want to create gaps between the tabs you've to edit the theme:

1. Select the TabContainer and search the property inspector for "Theme"
2. Choose "Create New Theme" and a new window at the bottom will open
3. In that window, choose Edit Theme > Add Class Items > TabContainer
4. Back in the inspector, unfold Tab Container > Styles
5. Choose New StyleBoxFlat for "Tab Bg"
6. Now change Border Width > Left / Right, e.g. to 100
7. Then set Border > Color to fully transparent (i.e. the A(lpha)-value to 0)
8. For more inner space, change Expand Margin > Left / Right
9. Repeat steps 5-8 with "Tab Disabled" and "Tab Fg"