Hi, sorry, I'm not understand you.
You create map, and set the zoom for it.
If you create menu item - by default you can see map with this zoom.
If you publish map by plugin - you can show map with this zoom (not enter new zoom value), or override it.
For component in menu item you can override it too.
Addition to this - you can add for your placemark (for each) - zoom by click - to change zoom to specified what you click on placemark
You can show/hide zoom control in map details in section "Map Controls"
To change zoom position on map you can un map details in section "Map controls" in "Control Positions"
If you can't see zoom on map (if you set it) - look at my docs
wiki.zhuk.cc/index.php?title=Zh_GoogleMa...ontrol_has_bad_shape
and can read this thread
forum.zhuk.cc/index.php/forum/gm-compone...ymbols?start=12#3213