Problem assigning materials to a selection of polygons


I have a complex object with many parts that I had been happily selecting polygons and assigning different textures to. I do not know what I di if anything, but all of a sudden when a select a part and try to texture it, the entire object changes to that new texture. I do not know how to set select but it does not seem to work…any ideas?
Thanks in advance


Make sure your selections and textures have the same name/designation.
Make sure you select the object, then the selection with polygon highlighted.
After selecting the tag you may also need to scroll down to “show selection”.
It gets a bit confusing with dozens of selection tags.