Add documentation for 'Brim use EFC outline' option (#68)

* Add documentation for 'Brim use EFC outline' option

Documents the new 'Brim use EFC outline' setting, explaining its purpose and usage in relation to Elephant Foot Compensation. This helps users understand when to enable the option and its potential effects on brim adhesion and removal.

* Update

* Update others_settings_brim.md

print_settings/others/others_settings_brim.md

@@ -15,6 +15,7 @@ Brim is a flat layer printed around a model's base to improve adhesion to the pr
     - [Ear detection radius](#ear-detection-radius)
 - [Width](#width)
 - [Brim-Object Gap](#brim-object-gap)
+  - [Brim use EFC outline](#brim-use-efc-outline)
 
 ## Type
 
@@ -100,3 +101,12 @@ Increasing this value widens the brim, which can improve adhesion but increases
 
 Gap between the innermost brim line and the object.  
 Increasing the gap makes the brim easier to remove but reduces its adhesion benefit; very large gaps may eliminate contact and negate the brim's purpose.
+
+### Brim use EFC outline
+
+When enabled, the brim is aligned with the first-layer perimeter geometry after [Elephant Foot Compensation](quality_settings_precision#elephant-foot-compensation) is applied.  
+This option is intended for cases where [Elephant Foot Compensation](quality_settings_precision#elephant-foot-compensation) significantly alters the first-layer footprint.
+
+If your current setup already works well, enabling it may be unnecessary and can cause the brim to fuse with upper layers.
+
+![brim-use-efc-outline](https://github.com/OrcaSlicer/OrcaSlicer_WIKI/blob/main/images/brim/brim-use-efc-outline.svg?raw=true)

print_settings/quality/quality_settings_precision.md

@@ -71,7 +71,7 @@ This feature compensates for the "elephant foot" effect, which occurs when the f
 - Weight of the material above them.
 - Thermal expansion of the material.
 - Bed temperature being too high.
-- Inaccurate bed height.
+- Inaccurate bed height/Leveling.
 
 ![elephant-foot](https://github.com/OrcaSlicer/OrcaSlicer_WIKI/blob/main/images/Precision/elephant-foot.svg?raw=true)
 
@@ -106,6 +106,11 @@ Assuming the compensation value is 0.25 mm:
   - 5th layer: `0.25 − (0.25 / 5) × (5 - 1) = 0.05mm` compensation (20%)
   - 6th layer and beyond: No compensation (0 mm).
 
+> [!NOTE]
+> This feature will look like the part have a smaller footprint on the build plate in the preview, but the final print (if calibrated correctly) will have the correct dimensions after slicing.  
+> That's why the Brim may look disconnected from the object when this feature is enabled. But in the final print, the brim will be correctly attached to the object.  
+> If you use a high value for the Elephant Foot Compensation Distance, you may want to enable the [Brim use EFC outline](others_settings_brim#brim-use-efc-outline) option to ensure proper brim attachment.
+
 ## Precise wall
 
 The 'Precise Wall' is a distinctive feature introduced by OrcaSlicer, aimed at improving the dimensional accuracy of prints and minimizing layer inconsistencies by slightly increasing the spacing between the outer wall and the inner wall when printing in [Inner Outer wall order](quality_settings_wall_and_surfaces#innerouter).