Three buttons for display on a given Modifier are: Render / Realtime (Object?) / Edit. Toggle those to "see" the modifier or not in those modes.
Object mode, right-click the mesh, Shade Smooth
- Which is cosmetic, but doesn't affect the mesh itself.
- For THAT, go to the properties section, the wrench (modifier)
- Add Modifier, Subdivision Surface.
- Until you click Apply, the modifier doesn't actually change the mesh.
- It's a soft-change, as it were.
- Viewport value seems to affect smoothness, in Subdiv. Surface modifer.
- AHA. Viewport value is "what you see in Blender", Render is "what you get when rendering". Duh.
The Solidify modifier adds thickness, such as to an icing layer on a virtual donut.
- Change Offset so it thicknesses outward, not inward. 1.0 instead of -1.0, I guess.
- Change thickness to .0025 or so to make the thickness something icing-sane.
- Fixing the hard edge on the icing? Move the solidify ABOVE the other modifier.
- Inner Crease value will make it "hug" the underlying donut mesh a bit better. Value of 1, probably?