Hi.
I imagine that printing one object on the plate at a time is “better” then printing all the objects on the plate in one go.
I´m not sure why i think that, but a reason would be that when the printer is finished with one layer on one part and move to the same layers on the other parts, that layer in the first part will cool to much, making the layer after that not sticking enough. I might be overthinking this and are overly cautious.
And i know that if there is space enough i can use print sequence by object.
Thanks for this nice community.
When I am using filament that tends to string a lot (PETG, TPU) I will usually print things one at a time to reduce stringing. When printing very small parts or parts with tall thin features I will print by layer. If there is only one part I will add a cube, etc to increase the layer time a little.
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It strongly reduces the amount of travel if you can Print-by-object instead of all at once. This is usually a good thing, but as with all things, not always.
Global process → other → printing sequence → by object
The slicer GUI will guide you to how to arrange the objects with clearance so the toolhead doesnt slam into the already printed objects
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Thanks. As i wrote in my last sentence, i know about the print by object. But that is not my “issue”. 
Well it’s not correct to say it’s always better or gives better quality, so I’m not sure what more to say nature of the beast, its a tool for your toolbelt. Materials like PLA don’t benefit a lot (mechanically) from tuning layer times, but things like ABS and ASA need to pay a lot of attention to this. Extraordinarily small items usually benefit from per-layer in order to increase the amount of time between layers so the previous one isn’t still molten.
If you are using a heated bed and/or enclosed chamber, often the difference between layer-by-layer or by-object really doesn’t have any meaningful impact, and other considerations become more important. For example, if you are printing in multiple colors, does print-by-object result in less filament changes? Or, maybe one part looks more technically challenging to print, and maybe you want to set the printer to finish the easier stuff before printing the harder one, so that if the harder part fails, you still have the other pieces.
I’ll often print-by-object if I’m printing different pieces in different filament, and it will result in fewer filament changes.