There is obviously some intelligent code on were to place the splitter between the design area and the columns grid based on the current depth of the application window etc

In most cases this works well and is what you want

If you send Clear to the main aqb object it appears to perform this calculation again

If you have resized/maximised the window containing the control since opening it this gives the slightly odd effect of the splitter jumping up as I assume it's based on some 1/3 2/3 split of the available space

Feel free to disagree but I don't think this should be re-calculated when Clear is sent ? ie the splitter should not move during the clear operation only on initial load ?