Kit - with an MF lens you must shoot with "shoot w/o lens" enabled otherwise it doesn't work. With this setting - and focus peaking set, focus peaking operates with both manual and AF lenses. However, DNF works only with AF lenses not with MF's (guess you realise this) For an enlarged (x4.8) image for focusing, you press the bottom button - "Soft key B" - focus peaking remains in operation. Press soft key B again and the image is enlarged (x9.6) further (but handheld, camera movement makes focusing difficult).
With an AF lens the max magnification with DMF is x4.8, and to get x9.6 with an AF you need to change to full MF.
Hope I understood your Q's correctly and the above helps.