The KeepLines property returns or specifies whether straight line segments are warped in the envelope. If the KeepLines property is True, the envelope effect keeps its lines straight.
Examples:
The following VBA example creates a text object, applies an envelope effect to it, and then specifies that straight lines are to be preserved in the distorted text object.
Sub Test()
Dim s As Shape, eff As Effect
Set s = ActiveLayer.CreateArtisticText(2.75, 5, "Text")
With s.Text.FontProperties
.Name = "Arial Black"
.Size = 150
End With
Set eff = s.CreateEnvelope(3)
eff.Envelope.KeepLines = True
End Sub