In Visual Basic or VB.NET you have the code and the design view of every form and you can switch easyly between it. I understand, that in B4X you can load more than one view in a Activity and also use the same view in more than one. But in most cases, I think, you have just one view in one activity.
In the IDE Designer-menu could be a menuitem like "Open current view", which starts the designer and loads the first view from the current activity tab, found in Activity.LoadLayout in Sub Activity_Create. This could make it more comfortable to change the view, when I am working on the code of a activity. With the menu shortcut F7 or Shift+F7 it would be also very familar for Visual Basic user.
In the IDE Designer-menu could be a menuitem like "Open current view", which starts the designer and loads the first view from the current activity tab, found in Activity.LoadLayout in Sub Activity_Create. This could make it more comfortable to change the view, when I am working on the code of a activity. With the menu shortcut F7 or Shift+F7 it would be also very familar for Visual Basic user.