There is a basic map in At5 the HDS 7 that contains good information for me, I have no way to edit it. With the help of my log files I want it to be supplemented. I is obtained and the result achieved is enough for me. The only big mnus for me, it's the brown area around the data that I need. It hides a lot of useful information card. I do card At5 through Export map is GPS. My device it correctly displays overlaid on my At 5 card. I just need to get rid of the brown field, tell me how to do it.

Disable the map category "Land area " on your HDS7 ?

T

I think the issue here is that an AT5 map replaces a built-in map for the area that it covers, and this area covers a certain minimum area, regardless of the actual map size.
You won't be able to see your built in map features that are underneath this, but, depending on what those features are, you might be able to replicate them as part of your map by using OSM data. This is easier to do than it sounds - take a look at this forum post for more details, including a video from Hunert.

In fact of the matter is that the replacement seems to me does not happen, and poishodit overlay. I see the coastal path, the water signs, but they are obscured by this marquee.

OK - I just noticed that you have a raster map there. If you have generated the OSM background yourself, then the issue you have is that your vector OSM map is being rendered underneath the raster. You must have the at5.xml file that is associated with your OSM at5 map on the unit, as this is the file that tells the unit how to render vector area features on top of raster. Try generating and exporting a vector map from RM instead of raster, or using the at5.xml file that was generated when you created the OSM map instead of the at5.xml file that is generated from RM. If that doesn't work, you might need to export your RM map as Shapefiles and combine with your OSM data so that you can generate a single AT5 map with a single at5.xml.

Unfortunately I can not edit my existing At5 card. It is a pity.