Gerbv doesn't appear to render slot cycles present in Excellon drill files. It renders the initial plunge hole of each slot, but not the finished slots as defined with G85 codes.

Here is an example of a slot cycle from one of my drill files:

G05
T4
X2.0872Y0.6494G85X2.1463Y0.6494

It would be quite helpful if slot cycle support was added to gerbv.

[Klaus B]

I have the same (or similar) feature request for milled slots in my Excellon files created by Mentor Graphics.
Here is an example. There should be a slot milled, but gerbv shows only two circles.

M48
METRIC,TZ
FMAT,2
ICI,OFF
T14C1.8000
%
M71
G90
G93X0Y0
T14
G00X127500Y12500
M15
G01Y15100
Y9900
M17
T00
M30

It would be very helpful if gerbv could also display excellon files with milling data, like board outline or inboard cutouts or milled slots.