I would like to print only a set of selected rows of a big plan. For example, activities from 5 to 25. Is it possible in Project Plan 365 for Windows?

​You can print a set of selected rows by following the steps:
1. Go to menu tab Project and select Filter button
2. Then select filter by Task Range
3. It will appear a dialog. In the first textbox put 5 and in the second one 25. Press ok.

OR

1. Go to menu tab Project and select AutoFilter button
5. In task name column, create a filter to show only tasks from 5 to 25.
6. Then in Print Preview dialog you will see only tasks from 5 to 25 and you can print them.

How to Outdent a task?

To Outdent a task, go to menu Task-Outdent or drag and drop with the mouse from Task Name column.

You can group the tasks that share characteristics or that will be completed in the same time frame under a summary task. You can use the summary tasks to show the major phases and sub-phases in the project. Summary tasks summarize the data of their subtasks, which are the tasks that are grouped beneath them. You can indent the tasks as many levels as you need to reflect the organization of your project.

To indent a task, go to menu Task-Indent or drag and drop with mouse from Task Name column.

To use the Go To window go to menu Project - Go To. Select the desired ID or date and click OK.

In order to apply an autofilter, go to menu Project-Autofilter. Click on the autofilter arrow next to the column heading that contains the information you want to display, and then check the values in order to filter the table. The autofilter arrow and the column name will turn in blue.

Not all summary task values show the combined total of your subtask values. Although some summary task values (such as cost and work) represent the total subtask values, others (such as duration and baseline) do not. For example, application calculates the duration of a summary task as the total work time between the earliest start date and the latest finish date of its subtasks.

The summary task information summarizes the period between the earliest start date and the latest finish date of all the included subtasks. It does not show the sum of all the subtask durations. Because application calculates the summary task values, they cannot be edited. If you need to change a summary task's values, such as duration, update the individual subtasks. Summary task values are then recalculated.

To record the progress of the work made on tasks you need to modify the Percent Complete field for tasks. You can change the %complete from Gantt Chart by adding the %complete field or you can insert the %complete in Task Information dialog.

How do I remove an autofilter on a specific column?