You can access the budget entries for Key Persons from the Budget form or from the Key Persons form by using the Manage Key Persons button. The appropriate information from this dialog will flow into each form.
Appointment Type
When you are in the Manage Key Persons dialog, you'll see the person's Appointment Type as well as salary and fringe information for each budget period.
The entries in the Appointment type fields determine which salary fields are available. Here, the PI, Campo, has a 12-month calendar appointment. The Calendar Salary and Calendar Months fields are enabled, while the corresponding Academic and Summer fields are disabled, because Campo does not have an Academic/Summer appointment type. If you need to change the Appointment Type, it's best to do so in the person's Professional Profile and re-autofill the data to the budget using the refresh arrows, or you may end up with numbers you can't edit.
Effort and Salary Calculations
To determine the requested salary, you can use the person's base salary as entered in the Cal. Salary or Acad. and Sum. Salary fields along with an effort entry in the Months field. For our PI, Campo, we can enter 3 in the Cal. Months field.
This automatically populates the requested salary with the correct amount based on the effort. If the person has Fringe Benefits entered in their profile, these will also be calculated and added to the total in Funds Requested.
If you've calculated your effort in percentages rather than directly in person-months, instead of 3 you could enter 25%. This will immediately be converted to the correct number of person-months (using the total appointment duration as 100%) and the salary will be calculated as well.
If you attempt to enter values that are too large, you'll see an error message. Enter the correct number or percentage to correct the error.
Key Person Budget Escalation
To arrive at the correct requested salary for all budget periods, you can type in the numbers manually, but you can also use the Budget Escalation tool for Key Persons. Clicking the 
icon to the left of the budget data opens the Key Person Budget Escalation dialog, where you can either simply copy the information across all periods, or escalate the budget for the Key Person over multiple budget periods based on expected increases in compensation. You can choose the rate of escalation and which budget periods the escalation will impact. Selecting Pre-Escalate Budget Period 1 Salaries will escalate Budget Period 1, which is not escalated by default. Click on the 
icon for a more detailed explanation of this functionality.
Selecting Escalate Key Person Over Selected Budget Periods will perform the escalation. Selecting Replicate Key Person Without Escalation will copy the same base salary across all the selected periods.