Bug or documentation issue: -Xc and -Xf don't work in modern mode

[seisman]

Description of the problem
In the following script, I try to shift the plotting origin with different ways. -X10c, -Xa10c and -Xr10c work as expected, but -Xc10c and -Xf10c don't.

gmt begin
for mode in "" "a" "c" "f" "r"; do
	echo "Shift plotting origin with -X${mode}10c"
	gmt figure shift-X${mode}10c png
	gmt basemap -R0/10/0/10 -JX10c -Baf -B+tFrame1
	gmt basemap -R0/10/0/10 -JX10c -Baf -B+tFrame2 -X${mode}10c
	gmt basemap -R0/5/0/5 -JX5c -Baf -B+tFrame3
done
gmt end show

-X10c or -Xr10c

-Xa10c

-Xc10c

-Xf10c

System information

• GMT version (gmt --version): 6.5.0_21ae9cb_2023.03.05

[PaulWessel]

Just so I understand, those work OK in classic? I can see why they may not be appropriate in modern mode so perhaps the easy way out is to

1. State in the documentation that -Xc|f are for classic only
2. Actually disallow those settings in modern.

[joa-quim]

Agree and I would even hide c from docs. In the times of psconvert -A and walled sized papers it really makes no sense.

[seisman]

Just so I understand, those work OK in classic? I can see why they may not be appropriate in modern mode so perhaps the easy way out is to

1. State in the documentation that -Xc|f are for classic only
2. Actually disallow those settings in modern.

I agree that both make no sense in modern mode.

[PaulWessel]

Implementing the new check on -Xc and -Xf yields 5-6 failures as those scripts used -Xc I think. Will need to run without to see if any issues,

[gd-a]

Is it related?

#6291

[seisman]

Is it related?

#6291

I think these two issues are related.

Do you agree that -Xc and -Xf don't make sense in modern mode?

Could you please check if you still have the problem in #6291 after Paul's PR #7304 is merged into master?

[gd-a]

Could you please check if you still have the problem

@Will do later today@.
Seems to work

[gd-a]

Do you agree that -Xc and -Xf don't make sense in modern mode?

I don't.
Now that I switched to modern mode for most of my scripts, being flexible with positioning is a big plus ... At least, it is as long as figure, subplot and inset are not well-rounded.

See this example. Being able to position each part (especially in movie environment) can be a real hassle