Something like this: /--------------------------\ | 10^-3 _ | |T l|--------------| |_|7 | |i a| /----\ | |_|6 | |t b| / /--\ \ | |_|5 | |l e| | / /\ \ | | |_|4 | |e l| | \ \/ / | | |_|3 | | | \ \--/ / | |_|2 | | | \----/ | |_|1 | | |--------------| |_|0 | | label 10^-3 | | Title | \--------------------------/ would be ideal.