Global Power Labels

Hi, I am using a DC-DC Buck converter to convert 12V DC to 3.6 V DC. The screw terminals J1 are the battery inputs, and the other side is the output.

My question is how do I facilitate the power supply to other components in my schematic(which is not present at the moment).

Is using global power label recommended if so how do i make use of it?

PS: my schematic is large and may go upto 3 pages long.

Power symbols already are (glorified) global labels, and if you use them on multiple sheets, they get connected…

Using the different kind of labels is a pretty basic feature of KiCad. Have you read the manual?

(You probably have a local copy of this in the Help menu in KiCad).
It’s also been described multiple times on this forum. In general we expect people to use their own initiative, and only start new topics when they get stuck on some part of KiCad.

Vcc - or any power label- connects in the same way that GND connects - as you have already taken advantage of in your schematic

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