IndependentArt

Ein Textfeld mit Farbe füllen geht über Ansicht>Studio>Textrahmen und dann unter Allgemein eine Füllung einstellen.

Oh, I just noticed, it makes a difference whether I choose "convert color space". Guess, I don't do that on my other project.

Hi IndependentArt,
Welcome to the forums
Which format are you exporting to when you get this issue? It could be the case that you are exporting to a format that doesn't support the layer fx you have used so rasterising is needed before export to retain fidelity.
Thanks
C

I am not sure if I understood your question. When you resize an (Image) layer or a (Picture Frame) layer, the raster content is not resampled so basically you only change the placed PPI data (which is correct and important to not inadvertently e.g. make sharp edges fuzzy). On the other hand, if you have a (Pixel) layer, then resizing causes resampling of the content (and also upscaling), and then I think that resampling always happens using the bilinear algorithm (and I do not think you can change this) -- normally this should be avoided and to have better control on sheer pixel data, it is better to handle these kinds of tasks by editing the content directly in Photo.
EDIT: When exporting, many export methods have an option that specifies whether resampling is allowed for images with higher than the specified trigger PPI. While the job-wide trigger and general allowance of resampling is honored, the resampling method unfortunately is not, so even if specifying "Nearest Neighbor", the images with higher PPI than specified will be resampled by an algorithm (most probably bilinear) that causes fuzzy (antialiased) edge.