Previewing files
TODO:Preview Proofapplies read,the uploadactive images,rules updateand links.shows the resulting names, without making any changes to files on disk. It is the essential step between setting up rules and committing to a rename.
Workflow
ReNamer showsWhen a preview ofis triggered, each marked file is passed through the newrule filenames,stack in order. Each rule transforms the name produced by the previous one, so thatthe youfinal result in the New Name column reflects all active rules applied cumulatively. This is why the order of rules matters — the same rules in a different sequence can decideproduce whethera yourdifferent outcome.
Only marked files and marked rules are workingincluded. as expected. If someUnmarked files showare unexpectedskipped results,and edittheir someNew Name column remains empty. Unmarked rules are ignored, which is a convenient way to test the effect of individual rules without removing them from the stack. See Managing rules andfor checkmore detail.
Preview results
After a preview, the previewFiles again.
Walkthrough
Let us see howreflects the preview works.
In the example below, there are three rules in the stack:
The ReNamer preview is shown below.
We can see that:following:
InThe State column indicates whether each file is ready to rename or has a potential issue. A green arrow means theFilesfilepane,istheready.StateA warning sign flags a problem such as a duplicate name or an invalid character.
ThereNote that preview validation can flag common problems in advance, but not every possible failure can be detected before the actual rename. See Validation for more detail on how warnings are many program options for previewing and preview process can vary based on those settings. For example, you can set it to refresh the preview automatically when new files and/or rules are added.generated.
You may also want to customize theThe columns displayed in the Files pane pane.can Forbe example,customised. manyMany users prefer to seeshow the Path and New pathPath columns.
Example

The example above has three rules in the stripstack: two Clean Up rules that containsreplace allpunctuation column-headers.characters Aand menustrip popsbracket upcontents, allfollowed availableby columns.a SelectCase rule that capitalises the columnsfirst youletter want. From now on, ReNamer remembersof the name.
Do not change me.doc is unaffected by the rules and its new This is a.test, the same result as the file above it. The Error column flags this as Duplicate in the list, which would cause a conflict at rename time.
ManualAutomatic modeand manual preview
IfBy youdefault, dopreview notupdates selectautomatically whenever files or rules change. This behaviour is controlled by the AutomaticAuto preview option in Preview settings.
When Auto preview is disabled, preview must be triggered manually by clicking the Preview mode, you must press the 
button toor seepressing theF5. preview.
This Manual Preview' mode is actually useful ifin youtwo dosituations:
WhileIn usingboth themodes, Manualfiles Preview mode, keep the following in mind:

