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alerque / libertinus

The Libertinus font family
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Math font with exponent can not be displayed correctly in MS PowerPoint #465

Closed TingjieGuo closed 3 years ago

TingjieGuo commented 3 years ago

Describe the bug Math font with exponent can not be displayed correctly in MS PowerPoint

Steps to reproduce Insert an equation in PowerPoint and write any expressions containing exponent

Expected vs. actual behavior Exponent is not displayed as what I type.

Screenshots / logs If I write the following equations image

I got the following results in PowerPoint image

TingjieGuo commented 3 years ago

This seems a bug of PowerPoint but I'm not sure...

DJakov-beep commented 3 years ago

Hi, I tested a few things and it seems that PowerPoint has - in contrast to MS Word - serious Problems with Opentype Math Fonts other than its default Cambria Math. Mysteriously it can handle some fonts, while it bugs at others with a seemingly random behaviour, as you can see here (results are equal, no matter if equations were created in MS Word and then copy- pasted into PowerPoint or typed directly in PowerPoint ) image

Strangely it displays the exponents correctly, when one formats them in bold, here for Libertinus Math: image

Alternatively you can create the equation in Word, take a screenshot and insert it into PowerPoint. During a presentation a viewer cannot distinguish if the equations are "real" or only bitmap.

Obviously, the ways presented above are only a workaround, the buggy behaviour of PowerPoint remains.

TingjieGuo commented 3 years ago

Yeah I realized that too, indeed the issue with powerpoint. Thanks for the thorough test!

KrasnayaPloshchad commented 3 years ago

This should be feedback to Microsoft.

DJakov-beep commented 3 years ago

@KrasnayaPloshchad Done. I contacted the development team of Office Math and they responded. They possibly will have a look at it. But forecasts when the Issue will be solved are not possible.