I'm a bit new in this area, trying to make a PCB for my little project and cannot find how to make placeholders for smd components in Eagle 9.2.2. Is it possible to have/create outlines for smd (resistors, capacitors etc) in the cam processor/silkscreen? Cannot find how. Would be great if there's an option to have different outlines types. Thank you.
You can draw anything (eg. lines) for example on the tNames layer of element footprint (in the library editor), so you could draw a rectangle around a resistor.
You can also use any other layer you want, but then you will have to make sure that that layer gets exported to the silkscreen gerber file before PCB fabrication.
If I understand you correctly, You wish to make a placeholder, ie. a graphic that is visible on the so called PCB silkscreen?
All the data which goes into the silkscreen is collected from various layers in Eagle during the CAM process. There you can tell the CAM processor to include not only the standard tPlace and tName layers, but also such layers that you have created yourself. And they don't have to be in the component library, if you don't wish to modify those. (eventually you will, trust me :) )
Just create a new layer called MySilk (or something) and draw whatever pleases you using the ordinary line, arc, rectangle and whatever other tools are in Eagle nowadays (I'm still on v7). Then, when you are in the CAM Processor, make sure you add your layer in the "Silk" section. There are many good tutorials online showing you the CAM process and how it's handled in Eagle.