Add Hatch Pattern To File
The Add Hatch Pattern To File dialog is for browsing and adding additional built-in hatch patterns to the current Rhino model.
Import
Imports hatch patterns from a .3dm or .pat file.
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PAT 3.0 format is supported.
A PAT 3.0 file must include VERSION, UNITS, and TYPE declarations at the beginning of the file, like this:
;%VERSION=3.0
;%UNITS=(Can be MM or INCH)
;%TYPE=(Can be MODEL or DRAFTING)
Export
Saves the currently selected hatch patterns to a .pat file.
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Hold the Ctrl key (Cmd on Mac) or Shift key to select multiple hatch patterns.
Search
Lists only the hatch patterns that have the input text in their names.
Pattern list
Displays the thumbnails of available hatch patterns in the model.
Actions
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Right-click on a hatch pattern to show the context menu.
Right-click context menu
Import Hatch Patterns
Imports hatch patterns from a .3dm or .pat file.
Export
Saves the currently selected hatch patterns to a .pat file.
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Hold the Ctrl key (Cmd on Mac) or Shift key to select multiple hatch patterns.
Previews Show Pattern Unit Outline Color
Distinguishes hatch pattern scaling types by outline colors: red for layout units and blue for model units.
Previews Show Pattern Unit Icon
Distinguishes hatch pattern scaling types by overlay icons: 
for layout units and 
for model units.
Scale Slider
Move the slider to change the size of the pattern thumbnails.
Grid view
Displays hatch patterns as large thumbnails arranged in a grid.
List view
Displays hatch patterns in a vertical list with smaller previews.
All Hatches
Lists all hatch patterns, regardless of scaling types.
Layout Units (Drafting)
Lists only the hatch patterns that use layout units.
Model Units
Lists only the hatch patterns that use model units.
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If a hatch pattern is set to use Model Units, it is not affected by Use Hatch Scaling.