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-rw-r--r--sway/sway-input.5.scd15
1 files changed, 10 insertions, 5 deletions
diff --git a/sway/sway-input.5.scd b/sway/sway-input.5.scd
index 8a1f2700..442311bb 100644
--- a/sway/sway-input.5.scd
+++ b/sway/sway-input.5.scd
@@ -121,11 +121,16 @@ The following commands may only be used in the configuration file.
*input* <identifier> map_from_region <X1xY1> <X2xY2>
Ignores inputs from this device that do not occur within the specified
- region. Can be in millimeters (e.g. 10x20mm 20x40mm) or in terms of 0..1
- (e.g. 0.5x0.5 0.7x0.7). Not all devices support millimeters. Only meaningful
- if the device is not a keyboard and provides events in absolute terms (such
- as a drawing tablet or touch screen - most pointers provide events relative
- to the previous frame).
+ region. Can be in millimeters (e.g. 10x20mm 20x40mm) or the fraction of the
+ full available space in terms of 0..1 (e.g. 0.5x0.5 0.7x0.7). Not all
+ devices support millimeters. Only meaningful if the device is not a
+ keyboard and provides events in absolute terms (such as a drawing tablet
+ or touch screen - most pointers provide events relative to the previous
+ frame).
+
+ Commonly used to maintain the aspect ratio of the input device and screen.
+ Cropping a 16:10 input region to match a 16:9 display can use 0x0 1x0.9 as
+ the argument.
## LIBINPUT CONFIGURATION