Possible bug(s) in the new "Set Transparent Color" picker

geomanniegeomannie Global Mapper UserPosts: 208Trusted User

I am very keen on the possibility of setting multiple transparent colours on raster overlays, but I am having trouble using the tool as currently implemented.

Firstly, when I use the pick from map tool, it does not pick from the uppermost overlay (e.g. the red in the attached image) but from the first drawn image, in my case a Bing satellite image (I get green instead of red). I can get the tool to pick the uppermost layer only by switching off the underlying images. I have tried the latest daily build but this hasn't helped

The second associated problem is that once I have created an inappropriate transparent colour, I can't find an easy way of deleting it. How is this done?

Thanks for any help that you can give me,



Best Answers

  • chaichai Posts: 5
    Answer ✓
    Same observation here.  You have to uncheck the underlying layer first to get the color of the raster overlay you wish to make transparent.  And yes, I suggest there must be a delete button if one wish to not include colors which are initially selected. 
  • bmg_bobbmg_bob Global Mapper Programmer Posts: 2,134
    Answer ✓

    These issues have been addressed in the latest daily build.
    • The color picker will select the color from the topmost layer. 
    • You can delete a color from the list by selecting it in the list and pressing the Delete key.


  • geomanniegeomannie Global Mapper User Posts: 208Trusted User
    edited April 22
    I have been told by support that this is a known bug and that they are working on a fix.
  • geomanniegeomannie Global Mapper User Posts: 208Trusted User
    Thanks! Works perfectly now
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