document more config options.

robcast · Dec 7, 2023 · b2ec459 · b2ec459
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diff --git a/doc/src/site/markdown/digilib-config.md b/doc/src/site/markdown/digilib-config.md
@@ -204,6 +204,13 @@ The prefix (after `Scaler`) that leads to the IIIF API.
 
 The character that replaces a slash in the identifier of IIIF requests.
 
+```xml
+<parameter name="iiif-image-base-url" value="" />
+```
+
+The base URL used in constructing IIIF information resource URLs (needs to include servlet name and iiif-prefix).
+This is only necessary in some cases behind a proxy.
+
 
 ### Threading options
 

diff --git a/doc/src/site/markdown/iiif-api.md b/doc/src/site/markdown/iiif-api.md
@@ -81,6 +81,11 @@ in a directory with images then the contents of that file are added to the top-l
 information to the manifest.
 
 The configuration parameter `iiif-manifest-page-label` determines the format of the label of each image:
-`filename` uses the image file name (default, sans extension), `index` uses the index (counting from 1).
+the value `filename` uses the image file name (default, sans extension), `index` uses the index (counting from 1).
 
+Additional configuration parameters can optionally be used to fix the generation of URLs in the IIIF presentation
+API output when running behind a proxy that changes URL paths:
+  * `iiif-manifest-base-url`: base URL used in constructing IIIF manifests including servlet name and iiif-prefix
+  * `webapp-base-url`: web-application base URL used in constructing API paths
+  * `scaler-servlet-name`: Scaler servlet name used in constructing IIIF image API paths