Kaip sukurti "Microsoft Word" formoms lygiagrečiai išsiskleidžiančias formas?

I was not sure how to describe this without a picture, so here is what I have in mind:

You can create a table that includes the label and all the letter slots, then set the appropriate widths and borders as desired. For example, suppose you want nine letter slots:

1. Create a table with one row and ten columns
2. Set the width of the leftmost column wide enough to hold your label (3.5 centimeters, for example)
3. Set the width of the other nine columns to 0.5 centimeters
4. Remove the top, left, and bottom borders from the left cell (first column)
5. Remove the top border from the other nine cells

And there you have it:

The advantage of this method is that the user can move from cell to cell using the Tab Key, but cannot accidentally break the structure.

If you want the vertical lines to have half of the “normal” height, you can split the cells into two rows, have the label span across two rows, and set no border for the first row. The outcome will be quite similar visually to the image provided by MathMajor.