A method, comprising: at an electronic device with a display and one or more input devices: displaying, on the display, a representation of image data and a simulated depth effect indicator, wherein the simulated depth effect indicator includes a numerical indication of the current magnitude of the simulated depth effect; while displaying the representation of image data with a simulated depth effect as modified by a first value of a plurality of selectable values for the simulated depth effect, detecting, via the one or more input devices, a first input; in response to detecting the first input: displaying, on the display, an adjustable slider associated with manipulating the representation of image data with the simulated depth effect indicator, wherein displaying the adjustable slider comprises sliding the representation of image data on the display to display the adjustable slider, wherein the slider is displayed at a location that was previously occupied by a portion of the representation of the image data that is displayed above the slider after sliding the representation of the image data on the display, and wherein the adjustable slider includes: a plurality of option indicators corresponding to a plurality of the selectable values for the simulated depth effect; and a selection indicator indicating that the first value is a currently-selected simulated depth effect value; while displaying the adjustable slider, detecting, via the one or more input devices, an input directed to the adjustable slider; and in response to detecting the input directed to the adjustable slider: moving the adjustable slider to indicate that a second value, of the plurality of selectable values for the simulated depth effect, is the currently-selected simulated depth effect value; and changing an appearance of the representation of image data in accordance with the simulated depth effect as modified by the second value; and subsequent to changing the appearance of the representation of image data: displaying, on the display, the simulated depth effect indicator, wherein the simulated depth effect indicator includes an updated numerical indication of the current magnitude of the simulated depth effect, the updated numerical indication corresponding to the second value. displaying, on the display, a representation of image data and a simulated depth effect indicator, wherein the simulated depth effect indicator includes a numerical indication of the current magnitude of the simulated depth effect; while displaying the representation of image data with a simulated depth effect as modified by a first value of a plurality of selectable values for the simulated depth effect, detecting, via the one or more input devices, a first input; in response to detecting the first input: displaying, on the display, an adjustable slider associated with manipulating the representation of image data with the simulated depth effect indicator, wherein displaying the adjustable slider comprises sliding the representation of image data on the display to display the adjustable slider, wherein the slider is displayed at a location that was previously occupied by a portion of the representation of the image data that is displayed above the slider after sliding the representation of the image data on the display, and wherein the adjustable slider includes: a plurality of option indicators corresponding to a plurality of the selectable values for the simulated depth effect; and a selection indicator indicating that the first value is a currently-selected simulated depth effect value; a plurality of option indicators corresponding to a plurality of the selectable values for the simulated depth effect; and a selection indicator indicating that the first value is a currently-selected simulated depth effect value; while displaying the adjustable slider, detecting, via the one or more input devices, an input directed to the adjustable slider; and in response to detecting the input directed to the adjustable slider: moving the adjustable slider to indicate that a second value, of the plurality of selectable values for the simulated depth effect, is the currently-selected simulated depth effect value; and changing an appearance of the representation of image data in accordance with the simulated depth effect as modified by the second value; and moving the adjustable slider to indicate that a second value, of the plurality of selectable values for the simulated depth effect, is the currently-selected simulated depth effect value; and changing an appearance of the representation of image data in accordance with the simulated depth effect as modified by the second value; and subsequent to changing the appearance of the representation of image data: displaying, on the display, the simulated depth effect indicator, wherein the simulated depth effect indicator includes an updated numerical indication of the current magnitude of the simulated depth effect, the updated numerical indication corresponding to the second value.