Note: Do not add any space inside brackets or in between brackets. Next, hit (plus) at the very top, and make some annotations. Once you're done, click Add comments to annotate, under the right-hand side of “Annotations and notes” area in the sidebar. Annotation by text Tip: For better navigation through the PDF, choose “Text” and “Annotation by number” as the annotation options (below). Annotation by numbers Note: This has not been tested using Google Drive for Business or Google Cloud Print. Note: In the right-hand side of the PDF, select an annotation option from the drop-down list. A PDF in Google Drive or Dropbox automatically marks up if the following conditions are enabled: 1. A specific document type is marked up. This PDF annotation is marked up if document type is specified on the left on the PDF toolbar: Select the document type when editing. 2. An annotation icon is clicked There will not be a click on the annotation on the PDF itself and the annotation is marked up. If the “Annotation and comments” option is not selected, and you're not using PDF for Business or Google Cloud Print. The PDF automatically marks up if, 1. The text of the annotation is set in a different font. 2. The annotation can be set in a different font and color than the text of the PDF. If you want to add annotations on the text alone, choose the 'Text only' option. The PDF makes an image out of the text, when the following conditions are enabled: 1. You are annotating for private use. 2. The PDF has an image as its main content. 3. The image must be the same size as the text You can mark up PDF pages to Mark up PDF pages for private use with a specific set of notes. (This is not public). Once selected at the toolbar, you can add comments, add image, or add formatting to a PDF page.