[test-runner] Add desctiption for --update command

1 files changed, 4 insertions, 1 deletions

diff --git a/render-test/render_test.cpp b/render-test/render_test.cpp
index 98897bb912..13d6992e43 100644
--- a/render-test/render_test.cpp
+++ b/render-test/render_test.cpp
@@ -63,7 +63,10 @@ ArgumentsTuple parseArguments(int argc, char** argv) {
     args::MapFlag<std::string, TestRunner::UpdateResults> testUpdateResultsValue(
         argumentParser,
         "update",
-        "Test results update mode. Supported values are: \"default\", \"platform\", \"metrics\"",
+        "Test results update mode. Supported values are: \n\"default\" Updates generic render test expectations. \
+                                                         \n\"platform\" Updates platform specific render test expectations. \
+                                                         \n\"metrics\" Updates expected metrics for configuration defined by a manifest.\
+                                                         \n\"rebaseline\" Updates or creates expected metrics for configuration defined by a manifest.",
         {'u', "update"},
         updateResultsFlags);