I've tried this many times and it simply never 
takes. And there does seem to be a misfunction. 
For example, I invoke dosbox from a folder called 
xyz. But when I try to save the  map file, I get 
the console message, cannot open file in xyz/xyz. 
(It repeats the name of the folder.) So I created 
that dummy folder, and sure enough, the map file 
got saved there. However, it still doesn't 
register. From dosbox I can explicitly say, load 
this map file, and still the change will not 
occur. After restarting dosbox, the mapper editor 
always shows the original setting.
I also couldn't get any font setting to work. I 
tried Carl's settings, but they just resulted in 
error messages, even when I eliminated all the white space.
I also find that I cannot get the screen length 
commands to register, and I can't get any ttf 
font to load. Should the font be included in the 
dosbox folder? I have to invoke these commands 
from the dosbox menu, laboriously, each time.
I am finding everything much speedier, but I 
still am annoyed by a delay-before-repeat upon 
keypress and would love to be able to change that.
At 12/24/2021 02:18 PM, you wrote:
>To save Wengier some trouble when answering:
>
>Bill, Wengier’s instructions said nothing 
>about adding a line to a file. You use the 
>top-line menu Main, then Mapper Editor, and then 
>follow Wengier’s instructions exactly as written. Click Save when done.