This can be considered as a BUG...
Should be fix.
if you rename the pages accordingly to their function you dont rely on changes being stable
your not stuck using page0, page1 and so on
if you see my setup each button has its own page name
settings button has a settings page
any changes by mistake can simply be added and then renamed to the needed page
you can also rename object ID too
There are two function buttons for picture library.
1.if you deleted the picture by mistake,you can use the "insert" function to add the same picture into the same place( the new picture is inserted above the selected picture).
2.if you want to change the picture for a new one, you can use the "replace" function.
3.These two functions require the same quantity of the new pictures and old pictures.
It is through the name of communication, but ID is also very useful.In the same interface name is best not to be the same.
The Nextion Editor has since added Arrow Up (Bring Top) and Arrow Down (Bring Bottom) to the toolbar.
Using these arrows it is now possible to completely reorder all component ids for the components, with the exception of the Page component which will always retain id=0
As this is a historic topic, this will be marked as solved.