[quote:79569026b0="gongcon"]I tried to set it transparent in IceWM. however, it just make the backgroup color same as the Desktop. What's going wrong?[/quote]
this is called pseudo-transparency. it means it will copy the desktop background to the mrxvt background. so the problem is, if there's another window between the mrxvt window and the desktop, mrxvt will still show the background of desktop, but not the content of the intermediate window.
mrxvt can also utilize the translucent feature of the leatest Xorg 6.8.1. this is the true transparent: everything under the mrxvt window can be shown in the mrxvt window.