How to create a 3D boss from font curves

Create the surface or surfaces you want to use as the floor of your feature.

Create your text .

Use Extract font curve and extract the outer boundaries of the text.

Use Extract font curve again and extract the islands.

Create a spiral out 3D boss operationfor the floor surfaces using the outer boundary curves as the boundaries.

Set the curve allowance to the tool radius.

Create another spiral out 3D pocket operation for the floor surfaces using the island surfaces as the boundaries.

Again, set the curve allowance for this operation to the tool radius.