i got an icon from the internet which is png,i open it in ps and its in rgb colour mode ofcourse.but i change the colour mode to cmyk and save it
when i imported into indesign,in the link info,it says its rgb again!why isnt it appearing in the colour space as cmyk?
You can't be saving CMYK as PNG in Photoshop because PNG doesn't support that color mode. Most likely you've saved as .psd or another format that does support CMYK (you might not notice that when you clikk save you really got a Save AS dialog) without realizing it, and you are placing the original, not your conversion.
thank you peter.