Hi
You can use the uitab.Children property
Let say you have 3 tabs
tab1 tab2 tab3
you would like to arrange it as follows
tab2 tab3 tab1
you can use the following
tabs = app.Maintab.Children;
modified_tabs = [tabs(2);tabs(3);tabs(1)];
app.Maintab.Children = modified_tabs;
Hope this helps