To get back to Gantt Chart view and the Entry table, choose View and then Gantt Chart, and then choose View, Table, and then Entry.
Upon further investigation, you discover that those two tasks could probably be completed at the same time. In this scenario project managers typically try fast-tracking (which is overlapping tasks). Another option is that, instead of using a finish-to-start relationship, you can instead assign a start-to-start relationship or a finish-to-finish relationship—a relationship that would allow those tasks to occur simultaneously, as shown in the figure above.
If two tasks have the same resources, you might need to do some playing around with the schedule by assigning a different resource to one of the tasks so that those two tasks can happen at the same time.
Another option for building some slack into your project schedule is to actually remove a task or a task requirement. However, use this method only if removing a task requirement will not affect your project scope. Or, if your project scope is affected, be sure to ask the stakeholders for permission before making the modification. You certainly do not want to remove important tasks from your project schedule all in the name of building some slack into the project plan file.
Finally, you can modify Office Project 2007's default slack option by changing the number associated with slack. Office Project 2007 governs by the rule that marks a task critical if the task has zero slack. But you can change that slack number in the Calculation tab of the Options dialog box. This should be an option only if your company and project stakeholders agree to the change.