Gnuplot key horizontal spacing

Question

I am using Gnuplot and am trying to increase the horizontal spacing between the columns in the key. I have tried the following, but it hasn't helped to increase the spacing between the columns. (Spacing only does vertical).

set key font "hershey, 10"
set key left
set key vertical maxrows 10
set key samplen 10

However, the samplen doesn't increase the gap between the columns, it only makes the lines in the keylonger.

I am using:

G N U P L O T
Version 5.0 patchlevel 3    last modified 2016-02-21 

So, how would I increase the gap? Thanks.

Answer 1

You can probably try

set key width 20