Adding a watermark on your photos is so easy by Fotor’s Photo Editor. Here’s the steps:
Step 1: Upload your photo in Fotor’s Photo Editor through those uploading photo ways. 
Step 2: Under the "Text" menu, choose any type of text box from heading, subheading or body text. 
Step 3: After adding the text of watermark and choose the font you like of the text, drug the text box to the position where you want to show the watermark. You can also choose the Text Formatting just like Italic or Underline as you like for your text watermark.
Step 4: Click “Transparency” button on the right above, and adjust the percentage to make the text transparent.
Step 5: You can also add the element as your watermark. Just click Elements button and search for the one you like, don’t want to change its Transparency too. 
Step 6: Or you can use an image as your watermark. Under the Cloud menu, click “Upload” to upload an image. Then drug the image to your photo and adjust its size and transparency. 
Step 7: Then you can share or export your photo.