MO-300 common mistakes
MO-300 · Understand the traps and how to avoid them.
Spending the first minutes manually building a slide master and layouts from scratch, then running out of time on the hands-on tasks that carry the most points.
Candidates study the 'Manage presentations' objectives in isolation and over-practice deep customization, so they treat every task as a master-editing exercise instead of recognizing that most tasks only need a layout or theme applied.
What to do instead
Practice the fast path first: apply a built-in theme, then edit the Slide Master only when the task explicitly says to change placeholders across all slides. Time yourself doing a full practice project and cap master edits at a few minutes.
Deleting and re-inserting a slide to change its position or layout instead of using Reuse Slides, Duplicate, or Reset, which breaks the intended result and loses content.
Candidates confuse 'move a slide' with 'rebuild a slide' and do not know that Reset restores placeholder positions while Duplicate preserves formatting.
What to do instead
Learn the three distinct tools: drag or cut/paste to reorder, Duplicate Selected Slides (Ctrl+D) to copy, and Home > Reset to restore a layout's placeholder positions. Use Reuse Slides only when pulling content from another file.
Typing text directly into a text box drawn on the slide when the task asks for content in a specific placeholder, so the text does not inherit the theme font and is not detected as placeholder content.
Candidates reach for Insert > Text Box because it feels faster, not realizing placeholder text drives outline view, accessibility, and theme-level formatting.
What to do instead
Click the placeholder prompt ('Click to add text') rather than drawing a box. If a box already exists, cut its text, paste into the placeholder, and delete the stray box.
Manually bolding and sizing every bullet instead of editing the master or using the Font and Paragraph groups, producing inconsistent formatting that fails a 'consistent across all slides' requirement.
Candidates format slide by slide because they do not trust or understand theme fonts and the outline level buttons.
What to do instead
Use Home > Font and Home > Paragraph for per-slide changes, and make global changes on the Slide Master. Use Increase/Decrease List Level (Tab and Shift+Tab) to set hierarchy rather than resizing text.
Stretching an image by dragging a corner handle without holding Shift, distorting the aspect ratio, when the task requires a proportional resize.
Candidates do not know that corner handles scale proportionally only when Shift is held (or when the aspect ratio lock is engaged), and they ignore the Size dialog's precise controls.
What to do instead
Hold Shift while dragging a corner, or open Format Picture > Size and set height and width together. Use Crop to fit rather than stretching to fill a frame.
Inserting a table and then hand-coloring cells instead of applying a Table Style, so the table does not match the theme and header-row formatting is missing.
Candidates treat tables as shapes and skip the Table Design tab, missing the Header Row and Banded Rows options that satisfy most formatting prompts.
What to do instead
Insert the table, then on Table Design choose a style and enable Header Row and Banded Rows. Use the Table Design > Shading and Borders groups for exceptions, not manual fills on every cell.
Building a chart from scratch with typed numbers when the task supplies a data source, or editing the chart's data in the wrong place, so the chart does not reflect the required values.
Candidates do not know the Edit Data workflow and the linked worksheet, and they miss that chart type changes belong on Chart Design > Change Chart Type.
What to do instead
Insert the chart, then use Chart Design > Edit Data to open the worksheet and paste the provided values. Change chart type via Change Chart Type and switch rows/columns via Switch Row/Column when the series are reversed.
Inserting SmartArt and typing into each shape separately instead of using the Text Pane, causing shapes to overflow and the layout to break when text is added.
Candidates click directly on shapes and do not use the Text Pane, and they forget that adding a shape requires choosing a layout that supports the required number of items.
What to do instead
Open the SmartArt Text Pane and type or paste the bulleted outline there. Use Add Shape (with the before/after option) and pick a layout with enough nodes, then use SmartArt Design > Layout to restructure.
Applying a transition to one slide and assuming it applies to all, or applying animations to the wrong object because the Animation Pane was never opened.
Candidates click a transition on the current slide and miss the Apply To All button, and they add animations without checking which object is selected or the effect order.
What to do instead
After choosing a transition, click Apply To All on the Transitions tab. For animations, select the target object first, then open the Animation Pane to verify order and use Effect Options for direction and timing.
Setting animation timing by eye instead of in the dialog, so the required duration, delay, or start trigger (On Click vs With Previous vs After Previous) is wrong and the sequence fails.
Candidates rely on the preview and the duration drop-down, and they do not know the Start options or the Timing section of the Effect Options dialog.
What to do instead
Use the Animations tab Start drop-down and open Effect Options > Timing to set Duration, Delay, and Repeat precisely. Use the Animation Pane's reorder arrows to fix sequence, and test with Slide Show > From Current Slide.