Text selection :   Selecting this feature allows you to highlight text in different colors. Click on this option to enable it. Then select the part of the text to be highlighted. You will always be offered the last-used color. Choose another color with a different opacity level from the color palette in the toolbar or from the menu above the selected text. Click and hold the text selection icon and you will be offered additional features such as functions to underline, squiggle, or strikethrough.

      Text input: Enable this icon and then click on the location in the PDF file where new text is to be added. The text overwrites the existing text in the file. Select the color palette in the toolbar and assign additional properties to the text such as background color, font size, text alignment, etc. Tap "Done" to end the text input. If you then want to change the text, click in the text field and customize it according to your requirements. Tapping longer on the text symbol in the toolbar presents you with additional options such as signature or callout.

     Notes: Select the "Notes" option and click on the location in the PDF file where the note is to be saved. Enter your text. Open the menu after the brush icon to select additional properties such as color and an icon allowing you to link the note on the file page. Tap "Done" to end the text input. If you want to change a note at a later date, click on the note in the PDF file and input the required changes.

      Thin pen: Select the pen to enter freehand text on a page of the PDF file. Select the color palette. The color palette offers additional properties such as pen thickness, opacity, color etc. Enable the pen, position it on the PDF file, and write. Put down the pen once text input has been completed. You can delete this text using the eraser.

      Thick pen: Select the pen to enter freehand text on a page of the PDF file. Select the color palette. The color palette offers additional properties such as pen thickness, opacity, color etc. Enable the pen, position it on the PDF file,

      Magic pen: The magic pen turns a crooked line into a bar and a tap on a PDF file into a dot. Select the color palette to assign additional properties to the magic pen

     Eraser: Use the eraser to delete text or shapes.

      Arrow and shapes: Tap longer on the arrow icon to access additional shapes. Use the color palette to add additional properties to the shape. Enable a shape in the toolbar and drag it to the required location in the PDF file. Use the color palette to assign additional properties to the shape such as color, thickness etc. If you want to change the shape, click on it. A menu opens above the shape. Select the "Inspector" function to change the shape. If you want to delete the shape, select the recycle bin from the menu.

      Groupings: You can group multiple comments by putting the box around them. Clicking on the grouping will open a menu above it. Here, you can ungroup or delete the elements in the grouping. Using a grouping allows you to move multiple comments at the same time.

      Insert images: This feature enables you to insert images and additional objects (stamps, links, voice messages, etc.). Tap longer on the icon to view the various options. If you would like to record a voice message, the recording function will appear underneath the file. After you finish recording your voice message, you drag it to the required location in the file. The recipient clicks on the sound icon  to listen to the message.