remove small objects
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spot healing tool
zoom in and set brush size
click spot
heal
continue to completion
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the brush size can be adjusted in the left side of the upper toolbar, or with the [ and ] keys.
paint the elements you wish to remove.
rename the file and save it as a .psd, which is the best file format for projects you wish to return to.
add objects by cloning
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adjust the brush settings in the upper left-hand corner.
while holding the ⌥ key, click the part of the image you wish to reference.
click to paint a clone of the selected reference onto other areas of the image.
clone tool
select stamp reference
click to stamp
paint with flowers!
remove a large object
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select object
fill...
content aware fill
deselect
correct with clone tool
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select the Fill... option under the Edit menu to summon the Fill window.
in the Fill window, find the Contents drop-down selection and choose Content Aware.
use the clone tool to correct any resultant blurriness from the content-aware fill.
exercise from 2017 Adobe Creative Cloud Photoshop Tutorial Article Retouch Images. https://www.adobe.com/learn/photoshop/web/selection-tools-basics