Combining ï with dot below

hello,
I need to combine the character ï (i with diaeresis) with a dot below. However when I try, a third dot appears on top of the i, like this: ị̈

thanks

There is probably a bug here. It may be located in Writer when handling combining diacritical marks or in the Harfbuzz font renderer.

I typed first ï which I can access directly from my keyboard the U+323 Alt+X for COMBINING DOT BELOW. It seems that we get the superposition of three glyphs: LATIN SMALL LETTER I (with its dot), COMBINING DIAERESIS (U+0380) and COMBINING DOT BELOW (U+0323). In addition the diaeresis is slightly offset to the right resulting in an ugly glyph.

As a workaround, I tried to combine LATIN SMALL LETTER DOTLESS I U+0131 with the others to eliminate the excess dot. It is even worse looking because diaeresis and dot below are offset to right, seemingly centered over the space between the dotless i and the next letter.

I suggest you file a bug report on https://bugs.libreoffice.org fully explaining the context in which you need such a combination (mathematical paper or specific language).

In case of some mathematical notation, you should try Math, the mathematical formula editor which allows to stack symbols without reference to Unicode conventions nor language morphology. This will require tuning the various parameters to achieve your goal.

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Thank you very much for taking the time to answer. I suspected this might be a bug but wanted to be sure before reporting it.

You’re welcome.

Out of curiosity, in which context do you need such a letter?

Turkic philology. The letter ï is used to indicate a certain sound; but when you are marking a vowel which hasn’t been written explicitly (in an old manuscript) but which you think should be there, you must write it with a dot below. Hence the need for this combination.

Thanks. Then I think the right combination would be LATIN SMALL LETTER DOTLESS I + COMBINING DIAERESIS + COMBINING DOT BELOW provided 1) dotless-i is not an error here, 2) the offset towards right is fixed.

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