I´ve done a suitability analysis and now I need to point to this certain area.
Is it possible to select and frame certain raster cells to enlighten those? Or can somebody explain how to insert a simple rectangle that cover an area somewhat precise?
If you have completed a suitability analysis then you have some raster cells attributed as suitable and the other cells unsuitable (or more suitable and less suitable). Use reclassify to convert the desired suitable cells to a value of 1 and the unsuitable cells to a value of NoData.
Finally, you can the convert the reclassified values to a polygon to get your highlighted area or use the reclassified raster to mask out the area you don't want to highlight. To mask, symbolize the 1 values with no color and the NoData values as white. Put the layer on top of the stack.