[Basil2]

Originally Posted by Lombra Font strings are not "frames", but "regions", and they're created differently, using frame:CreateFontString(). Frames are essentially no more than anchor points as far as visuals go. You need to somehow use textures to get something visible.

Thank you for guidance, I changed code to following:

f = RecommendOptionsFrame:CreateFontString("abc", "OVERLAY", "GameFontNormal")
f:Show()
f:SetText("12345555664dfgfdg")

However, text doesn't apear on frame Same XML code works perfectly

    <Layers>
      <Layer level="OVERLAY">
        <FontString name="OptionsString" inherits="GameFontNormal" text="Recommend options">
        </FontString>
      </Layer>
    </Layers>