How to combine two textures

So I need to basically draw an image on top of another image, but the location of where it will be drawn ontop of the other image needs to be able to change. It’s for drawing map markers over top of a map image for a minimap. Is there a way I can draw an image over top another image and a specified location / UV location?

There is a bunch of way to combine two textures.

Sound like you need to put a kind of UI layer on the source image.
Then Linear Interpolation would be good for you
Well it’s the node with the material editor ( which is using shading language )

Point is that you’re using an alpha channel to targeting the interpolating area (vector) then put a texture’s color value on source texture,
also by the alpha’s floating value and emmissive value , you can make it transparents, glowing whatever you want.
Node’s A/B side is src/dst
Here is better than my explanation!

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