Instead of importing a LEGO set in the viewport, you can create a custom building palette from the parts included in a particular set.

In a palette that’s imported from a LEGO set, each part has a color and shows the quantity used next to the part’s thumbnail. The quantity decreases each time you use a part in your design and parts will disappear from the palette once their quantity is depleted.

Import process

Create a new project.
Click on File | Import | Import LEGO Set…
An import window appears.
Make sure the Import Type (D) is set to As Palette.
Enter a set number (A).

Don’t forget the extension! Some sets share a number and they are
differentiated in the BrickLink catalog by a sequential number. For instance, 601-1 is Gas Pump and 601-2 is Tow Truck.
If the set is found in the BrickLink catalog, it will be displayed in the Preview (B).
Decide if you want to include minifigure parts or Extra Parts as shown in the BrickLink catalog by ticking the box next to the option (C).
Click Import (E).
Once the import process is complete, you'll see links to download the building instructions from LEGO.com (if they’re available).
If Studio doesn’t have all the parts available for the set, you’ll be shown a list of unavailable parts in the window along with a list of suggested replacement parts. By clicking on the dropdown for each part, you'll be able to skip replacing the part or add a custom part you created in PartDesigner and added to your Studio palette. Sometimes, there may be no appropriate replacement part, as seen with the red panda in the image below.
After you click "Replace and Proceed", the parts will import as a palette. If the set's building instructions are available on LEGO.com, they will be displayed.

You can also go through the Palette dropdown and select Config… to find Import a LEGO Set at the bottom of the window.
You can also import the parts of a LEGO set in the Building area.
BrickLink inventories have four sections.
- Regular: The parts used in building the set and its alternate models.
- Counterparts: Stickered parts or assemblies (like tires and wheels) that are paired together.
- Alternates: Variant molds that are used in newer copies of the set or parts used when sets were redesigned.
- Extra: Spare parts that can be found in new sets in case you lose them.
- Studio automatically imports regular parts and counterparts. You have the option to import extra parts too.
- Studio imports counterparts for stickered parts but also imports composing parts of assemblies. This can change the quantity shown in the palette, which will change even more when there are counterparts for alternates.

Studio Version 2.24.6_2 and earlier

You can create a palette of a LEGO set that includes a count of all the parts used.

In a palette that’s imported from a LEGO set, each part has a color and shows the quantity used next to the part’s thumbnail. The quantity decreases each time you use a part in your design and parts will disappear from a palette once their quantity is depleted.

Click on File | Import | Import LEGO Set…
A dialog window appears
Make sure that the Import Type (D) is set to As Palette
Enter a set number ID (A).

Don’t forget the extension: some sets share a number, and they are
differentiated in the BrickLink catalog by a sequential number. For instance, 601-1 is a Gas Pump and 601-2 a Tow Truck.
If the set is found in the BrickLink catalog, you’ll see info in the preview (B)
Decide if you want to include Minifigure parts or Extra Parts as shown in the BrickLink catalog by ticking the box next to the option (C)
Click Import (E)
Once the import process is complete, you see links to download the building instructions from the LEGO website (if they’re available)
If Studio doesn’t have all the parts available for the set, you’ll be shown a list of unavailable parts in the dialog.
The new palette is now selected and you can start building with its parts

You can also go through the Palette dropdown and select Config… to find Import a LEGO Set at the bottom of the dialog
You can also import the parts of a LEGO set in the Building area.
BrickLink inventories have four sections.
- Regular: the parts used in building the set and its alternate models
- Counterparts: stickered parts or assemblies (like tires and wheel) that can’t easily be disassembled
- Alternates: variant molds that are used in newer copies of the set or parts used when sets were redesigned
- Extra: spare parts that can be found in new sets in case you lose them
  - Studio automatically imports regular parts and Counterparts. You have an option to import the Extra parts too.
  - Studio imports Counterparts for stickered parts but also imports composing parts of assemblies. This can change the quantity shown in the palette which will change even more when there are Counterparts for Alternates.