Displaying the side menu in Report

sravanis  , Below code snippet would be helpful for your requirement.

load(
  local!buttonLabels: {
    "Submit1",
    "Submit2",
    "Submit3",
    "Submit4"
  },
  local!buttonAction,
  a!formLayout(
    label: "Sample Test",
    firstColumnContents: {
      a!buttonLayout(
        secondaryButtons: {
          a!buttonWidgetSubmit(
            label: local!buttonLabels[1],
            style: "PRIMARY",
            value: local!buttonLabels[1],
            saveInto: local!buttonAction
          )
        }
      ),
      a!buttonLayout(
        secondaryButtons: {
          a!buttonWidgetSubmit(
            label: local!buttonLabels[2],
            style: "PRIMARY",
            value: local!buttonLabels[2],
            saveInto: local!buttonAction
          )
        }
      ),
      a!buttonLayout(
        secondaryButtons: {
          a!buttonWidgetSubmit(
            label: local!buttonLabels[3],
            style: "PRIMARY",
            value: local!buttonLabels[3],
            saveInto: local!buttonAction
          )
        }
      ),
      a!buttonLayout(
        secondaryButtons: {
          a!buttonWidgetSubmit(
            label: local!buttonLabels[4],
            style: "PRIMARY",
            value: local!buttonLabels[4],
            saveInto: local!buttonAction
          )
        }
      )
    },
    secondColumnContents: {
      choose(
        if(
          isnull(
            local!buttonAction
          ),
          1,
          wherecontains(
            local!buttonAction,
            local!buttonLabels
          )
        ),
        a!sectionLayout(
          label: "Submit1",
          firstColumnContents: {
            a!paragraphField(
              value: "Submit1"
            )
          }
        ),
        a!sectionLayout(
          label: "Submit2",
          firstColumnContents: {
            a!paragraphField(
              value: "Submit2"
            )
          }
        ),
        a!sectionLayout(
          label: "Submit3",
          firstColumnContents: {
            a!paragraphField(
              value: "Submit3"
            )
          }
        ),
        a!sectionLayout(
          label: "Submit4",
          firstColumnContents: {
            a!paragraphField(
              value: "Submit4"
            )
          }
        )
      )
    },
    validations: {}
  )
)

Hi sravanis, Can you explain, why do you want to have a drop-down when you are working with Report?

In order to serve your requirement, why don't you go for a normal interface which you can expose to an end user using process model