Studio slow-down with certain fonts

Question

See: https://www.youtube.com/watch?v=EorEW5DOn0A 
 The segments switching in the first file is definitely smoother than the second. With the second file, a noticeable lag/glitch can be seen. There is also much larger text input lag, making the use of the software an unpleasant (and certainly not $700-worth) experience. 
 File size is about the same, project file storage location is the same. It clearly seems to be an optimization issue. My device is Surface Pro 2017, a Windows tablet with not-so-efficient Intel GPU, but do I really need a top-end GeForce to display FONTS smoothly? 
 I've seen this happen many, many times, and haven't spotted a trend so far as to which fonts exactly does Trados "prefer" for smoother operation. 
 With the "right font" (feeling like an idiot just typing this) the software runs very fast, switching the segments and searching the TM without any perceptible lag (quicker than on the video, which obviously has some inherent lag in it), so please don't tell me it's my inferior hardware. 
 The default language font setting (or something) in Studio only changes the font in the Translation Results window. Is there a way to fix the main translation text font too? Maybe this way I could achieve butter-smooth operation every day, with every project. 
 If not, what might be the problem? Has any of you experienced this?

Paul · Answer

Hi Adrian Komiński 
 
I must admit I found it hard to notice the difference, but I think there was one. Which fonts are you using? I can imagine a more complex font could take more resource to handle but it's not anything I have ever seen discussed before. So quite an interesting post and I'd like to reproduce your experiment to discuss it internally. 
 
In the meantime, you are looking in the wrong places, so perhaps take a look at these two videos I created a week or so ago for a question on how the font adaptation works in Studio: 
 
 www.youtube.com/watch 
 
 www.youtube.com/watch

Paul · Answer

Hi Adrian Komiński 
 
ok - in this case it would make sense to simply work without formatting and always display tags as a matter of course. This ensures several things: 
 
1. The editor view always looks the same for you 
2. You never miss tags 
3. The type of font that needs to be rendered is irrelevant 
 
I think the wysiwyg mode is distracting anyway and sometimes leads to more problems than it solves.

Paul · Answer

Adrian Komiński 
 File -> Options -> Editor -> Formatting Display Options -> Show all tags but do not show formatting 
 That will use the default Studio font for whatever your target language is. All explained in the videos.

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Studio slow-down with certain fonts