Fix OPTIONS.md doc (#1822)

doc/user/OPTIONS.md

@@ -23,7 +23,7 @@ Options|Default|Description
 \-\-load-plugins=\<paths or names\>||List of plugins to load separated with a comma. Official plugins are `alembic`, `assimp`, `draco`, `exodus`, `occt`, `usd`, `vdb`. See [plugins](PLUGINS.md) for more info.
 \-\-scan-plugins||Scan standard directories for plugins and display their names, results may be incomplete. See [plugins](PLUGINS.md) for more info.
 \-\-screenshot-filename=\<png file\>|`{app}/{model}_{n}.png`|Filename to save [screenshots](INTERACTIONS.md#taking-screenshots) to. Can use [template variables](#filename-templating).
-\-\-rendering-backend=\<auto|egl|osmesa|glx|wgl\>|auto|Rendering backend to load, `auto` means to let F3D pick the correct one for you depending on your system capabilities. Use `egl` or `osmesa` on linux to force headless rendering.
+\-\-rendering-backend=\<auto\|egl\|osmesa\|glx\|wgl\>|auto|Rendering backend to load, `auto` means to let F3D pick the correct one for you depending on your system capabilities. Use `egl` or `osmesa` on linux to force headless rendering.
 
 ## General Options
 
@@ -54,11 +54,11 @@ Options|Default|Description
 Options|Default|Description
 ------|------|------
 -o, \-\-point-sprites||Show sphere *points sprites* instead of the geometry.
-\-\-point-sprites-type=\<sphere|gaussian\>|sphere|Set the splat type when showing point sprites.
+\-\-point-sprites-type=\<sphere\|gaussian\>|sphere|Set the splat type when showing point sprites.
 \-\-point-sprites-size=\<size\>|10.0|Set the *size* of point sprites.
 \-\-point-size=\<size\>||Set the *size* of points when showing vertices. Model specified by default.
 \-\-line-width=\<size\>||Set the *width* of lines when showing edges. Model specified by default.
-\-\-backface-type=\<visible|hidden\>||Set the Backface type. Model specified by default.
+\-\-backface-type=\<visible\|hidden\>||Set the Backface type. Model specified by default.
 \-\-color=\<R,G,B\>|1.0, 1.0, 1.0| Set a *color* on the geometry. Multiplied with the base color texture when present. <br>Model specified by default.
 \-\-opacity=\<opacity\>|1.0|Set *opacity* on the geometry. Multiplied with the base color texture when present. <br>Model specified by default. Usually used with Depth Peeling option.
 \-\-roughness=\<roughness\>|0.3|Set the *roughness coefficient* on the geometry (0.0-1.0). Multiplied with the material texture when present. <br>Model specified by default.