To make a logo smaller in Photoshop, first, open the logo file and ensure the logo is on its own layer. If it’s part of a flattened image, you may need to use selection tools like the Magic Wand or Lasso Tool to isolate it. Next, select the logo layer, then go to Edit > Free Transform (or press Ctrl+T on Windows or Cmd+T on Mac) to activate the transformation controls. Drag one of the corner handles inward while holding the Shift key to maintain the logo's proportions as you resize it. Once you’re happy with the new size, press Enter or Return to apply the transformation. Finally, save your work by choosing File > Save As or File > Export, depending on your desired output format.