To create a sandbox for your board which can be added/removed at will in the designer, you will create two fill images for your board. One, for actual game play that matches the pixel dimensions of your board layer, and the second (the “sandbox”) for expanding the view of your board in the designer which is larger.

Make a second fill map that is larger than your board image. The extra space should..

• be added to the bottom and/or right hand side of your board such that the board layer still sits on top of and aligns with the fill layer.
• either be a clearly visible colour that differentiates where the board's actual fill area ends, or it can be transparent once off the playable area as long as some solid colour marks its furthest boundary.
• extend BEYOND a couple hundred pixels from your playable fill area.

Load it into the designer.

After uploading the expanded fill and having it in place, design your board with its off-screen territories by placing them into the expanded space to the right or bottom of your board, this being your sandbox! When using your sandbox, still DO NOT place your off-screen territories within a couple hundred pixels of the board or else those territory's in-game numbers will still be visible around the edge of your playable board surface. Place them beyond that range.

Once you are happy with your creation and want to do some development games then upload the fill area for game play which is not expanded for sandbox visibility. This will slide those territories out of the designer and will no longer be visible during game play. If a problem occurs during your development games then re-upload the expanded fill image to make the appropriate revisions to those off-screen attributes, then re-upload the fill area for game play to obscure them again, etc, until you are completely satisfied with the mechanisms of your board.