diff --git a/REDIRECTS b/REDIRECTS
index 4f8b13d0..18e22f9f 100644
--- a/REDIRECTS
+++ b/REDIRECTS
@@ -44,12 +44,14 @@ https://help.inputapp.io/developers	https://merginmaps.com/docs/howto/customapp/
 https://help.inputapp.io/developers.html	N/A - covered by non-html version
 https://help.inputapp.io/faq	https://merginmaps.com/docs/
 https://help.inputapp.io/howto/data_sync	https://merginmaps.com/docs/howto/data_sync
+https://help.inputapp.io/howto/datum_shift  https://merginmaps.com/docs/concepts/projections/
 https://help.inputapp.io/howto/enable_browsing	https://merginmaps.com/docs/howto/project/enable_browsing
 https://help.inputapp.io/howto/enable_digitizing	https://merginmaps.com/docs/howto/project/enable_digitizing
 https://help.inputapp.io/howto/exif_metadata	https://merginmaps.com/docs/howto/exif_metadata
 https://help.inputapp.io/howto/external_gps	https://merginmaps.com/docs/howto/external_gps
 https://help.inputapp.io/howto/package_qgis_project	https://merginmaps.com/docs/howto/manage/plugin/plugin-new-project
 https://help.inputapp.io/howto/position_variables	https://merginmaps.com/docs/howto/position_variables
+https://help.inputapp.io/howto/proj https://merginmaps.com/docs/howto/proj/
 https://help.inputapp.io/howto/project_config	https://merginmaps.com/docs/howto/project/features
 https://help.inputapp.io/howto/registration	https://merginmaps.com/docs/howto/input_features
 https://help.inputapp.io/howto/reuse_entered_values	https://merginmaps.com/docs/howto/reuse_last_values