diff --git a/README.md b/README.md
index 5d5034b0..1f002438 100644
--- a/README.md
+++ b/README.md
@@ -717,6 +717,7 @@ Next time you need this list just use an alias, like this:
         - `ignore_dnf`: [boolean=true] Exclude DNF (Do Not Fit) components.
         - `int_qtys`: [boolean=true] Component quantities are always expressed as integers. Using the ceil() function.
         - `merge_blank_fields`: [boolean=true] Component groups with blank fields will be merged into the most compatible group, where possible.
+        - `merge_both_blank`: [boolean=true] When creating groups two components with empty/missing field will be interpreted as with the same value.
         - `no_conflict`: [list(string)] List of fields where we tolerate conflicts.
                          Use it to avoid undesired warnings.
                          By default the field indicated in `fit_field` and the field `part` are excluded.
diff --git a/docs/samples/generic_plot.kibot.yaml b/docs/samples/generic_plot.kibot.yaml
index 75909b34..b406b66d 100644
--- a/docs/samples/generic_plot.kibot.yaml
+++ b/docs/samples/generic_plot.kibot.yaml
@@ -165,6 +165,8 @@ outputs:
       int_qtys: true
       # [boolean=true] Component groups with blank fields will be merged into the most compatible group, where possible
       merge_blank_fields: true
+      # [boolean=true] When creating groups two components with empty/missing field will be interpreted as with the same value
+      merge_both_blank: true
       # [list(string)] List of fields where we tolerate conflicts.
       # Use it to avoid undesired warnings.
       # By default the field indicated in `fit_field` and the field `part` are excluded