diff --git a/src/calng/AgipdCorrection.py b/src/calng/AgipdCorrection.py
index 3b894b80b2ebcc5c09c1b359e7b3ff7deb4db7f4..2199c9da093209fc3ecb85b1c7af1197efb9ea1e 100644
--- a/src/calng/AgipdCorrection.py
+++ b/src/calng/AgipdCorrection.py
@@ -50,6 +50,7 @@ class AgipdCorrection(BaseCorrection):
     def expectedParameters(expected):
         super(AgipdCorrection, AgipdCorrection).expectedParameters(expected)
         expected.setDefaultValue("dataFormat.memoryCells", 352)
+        expected.setDefaultValue("preview.selectionMode", "cell")
         (
             BOOL_ELEMENT(expected)
             .key("overrideInputAxisOrder")
diff --git a/src/calng/DsscCorrection.py b/src/calng/DsscCorrection.py
index e5fdc6ee362c220ffea95dbe5317cb0406aff245..2b74bed782c7bfb242a69b707b07519afa95db68 100644
--- a/src/calng/DsscCorrection.py
+++ b/src/calng/DsscCorrection.py
@@ -25,6 +25,7 @@ class DsscCorrection(BaseCorrection):
     def expectedParameters(expected):
         super(DsscCorrection, DsscCorrection).expectedParameters(expected)
         expected.setDefaultValue("dataFormat.memoryCells", 400)
+        expected.setDefaultValue("preview.selectionMode", "pulse")
         DsscCalcatFriend.add_schema(expected, DsscCorrection._managed_keys)
         add_correction_step_schema(
             expected,