Microsoft PowerPoint offers far more functionality than just a place to type text on a slide. Not only can you insert images onto the slides, but with PowerPoint's custom drawing tools, you can add details to those images as well. Experiment with doodles, such as masks, by drawing them directly onto the image on the slide, then personalise the mask with your colour preferences.
Open PowerPoint. Click the "Insert" tab at the top of the screen. Click the "Picture" button below the tab. Browse to the image to draw a mask on and double-click the name of the file. Drag the image into place as desired on the slide.
Click the "Shapes" button on the ribbon below the "Insert" tab. Click the "Scribble" tool, the squiggly line on the "Line" section. The cursor changes to a pencil icon.
Position the cursor to the top-left of the person's left eye. Press and hold down the "Shift" key on the keyboard. Draw a line across the face to the top-right of the person's right eye.
Select the "Scribble" tool again. Draw a half-circle from the left end of the line, dipping down into an arc to cover the person's left eye and ending up halfway in the middle of the line.
Repeat the "Scribble" process to draw the second half of the mask with another half-circle on the right side of the line, covering the right eye.
Click the first line drawn. Click the new orange "Shape Tools" tab that appears on the top of the work area. Click a colour for the mask from the "Shape Styles" section of the ribbon. Scroll to see more than just the three visible options.
Click the first half circle. Click the "Shape Fill" button on the ribbon. Select the same coloured square as you chose for the top of the mask. The half circle changes colour. Repeat to change the colour of the other half of the mask.
Click the "File" tab and select "Save As." Type a name for the file and click the "Save" button.