What if we start working an icon with 32x32 template and need more icon sizes from the base art. Like, I made a camera icon using 32x32 template and is in need of 48x48, 64x64 etc. Can we do this resize from the base art window ? If yes, please tell me how.

SVG stands for Scalable Vector Graphics. To change the size when rendering, simply change the pixel size in the export dialogue.

I am not sure I understood. Where is the export option ( which you mentioned ) in the menu ? I am not trying to export as PNG, but as SVG.

Update :

Got it

To export to PNG: File -> Export to PNG...

SVG is scalable. That means you can change from 32×32 to 48×48 by selecting everything and increasing its size by 1.5

1. Edit -> Select All
2. Object -> Transform...
3. Click on the Scale tab
4. Check Scale proportionally
5. Set the width to 150%
6. Click on Apply

All measurements in SVG are abstract. They are only for keeping objects the correct size relative to other objects. For convenience, some are real world measurements for translating a SVG file to another format, say those for CNC machines. But since the measurements are abstract, they are easily scaled to other measurement systems.