diff --git a/docs/DeveloperGuide.md b/docs/DeveloperGuide.md
index eccf49ad3c8..32877428f18 100644
--- a/docs/DeveloperGuide.md
+++ b/docs/DeveloperGuide.md
@@ -490,5 +490,12 @@ up with an empty list when the data in the json file is corrupted or has an inva
 has a logger warning shown in the developer console, but not the app itself. We plan have an error message show up on
 results display after startup of the app when the data is corrupted.
 
-2. **Store** the resume such that
+2. **Allow `filter` command to filter the contact list based on a combination of categories**: The current `filter`
+command only allows the contact list to be filtered based on one specific category such as tags, salary range etc
+and this may not be useful for users with a very huge number of contacts as filtering by only one category may still
+return a long list. It is also not convenient for users who want to find contacts more specifically. We plan to
+allow `filter` to filter the contact list more specifically. (e.g. `filter t/TAG s/SALARY_RANGE` will return
+contacts with matching `TAG` and `SALARY_RANGE` that falls within what is specified)
+
+3**Store** the resume such that