Why is there no Splitter Bar (View) to control panel widths?

I don't know why B4A doesn't have a splitter bar. A splitter bar is similar to a long thin panel that is only a few pixels thick, that separates two regions on the screen.

The splitter bar's orientation can be either

• Vertical so it separates two regions; one region to the left of the splitter and one region to the right of the splitter
• Horizontal so it separates two regions; one region above the splitter and one region below the splitter

The regions on each side of...

Why is there no Splitter Bar (View) to control panel widths?

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