diff --git a/01_lecture/build.gradle b/01_lecture/build.gradle
index d4e4b65..05487ad 100644
--- a/01_lecture/build.gradle
+++ b/01_lecture/build.gradle
@@ -5,25 +5,104 @@
     // id "org.barfuin.gradle.taskinfo" version "2.0.0"
 }
 
+// Configure the lecture.
 lecture {
+    // TYPICAL CONFIGURATION
+
+    // Specify the document targets for this lecture. Defaults to
+    // ["slides", "handout", "notes", "examples"], which are also the
+    // only valid values. Remove any you don't need.
     docTargets = [
-        // remove those you don't need
         "slides",
         "handout",
         // "notes",
         // "examples",
     ]
 
-    slidesImages = [
-        // example:
-        // "image1.png",
-        // "image2.pdf",
-        // "image3.pdf",
-    ]
+    // Specify the list of images used (\includegraphics) in the lecture
+    // documents. Defaults to []. These will become dependencies of the
+    // lecture documents. If the images are generated, use the name of
+    // the generated product, NOT the source file (e.g., use "foo.pdf",
+    // not "foo.puml").
+    // slidesImages = [
+    //     "image1.png",
+    //     "image2.pdf",
+    //     "image3.pdf",
+    // ]
 
-    generatedImages = [
-        // key = destination, value = source
-        // example:
-        // "image2.pdf": "image2.svg",
-        // "image3.pdf": "image3.R",
-    ]
+    // ADVANCED CONFIGURATION
+    // (i.e., DON'T TOUCH unless you know what you're doing!)
+
+    // Set the lecture number. This defaults to the numeric prefix of
+    // the lecture folder (e.g., "01_whatever"), but you can override
+    // it if needed. Use a zero-padded string.
+    // lectureNum = "01"
+
+    // Set the filename prefix for lecture documents. Defaults to "lecture".
+    // Lecture document filenames are formatted as "prefix_whatever.foo"
+    // e.g., "lecture_slides.tex".
+    // docPrefix = "foo"
+
+    // Set the images directory where included images are kept. Default
+    // "images". A lot of other things derive from this!
+    // imageDir = project.projectDir.dir("foo")
+
+    // Set the PDFs directory where the numbered versions of the lecture
+    // documents are written. Default "pdfs".
+    // pdfDir = project.projectDir.dir("foo")
+
+    // Specify the list of files used (\input) in the lecture documents.
+    // Defaults to the three files shown below, which are REQUIRED. All
+    // files in the list will become dependencies of the lecture documents.
+    // slidesFiles = [
+    //     "paper_init.tex",
+    //     "lecturedates.tex",
+    //     "doc_init.tex"
+    // ]
+
+    // Also:
+    //  examplesImages = [ ... ] list of images used in the examples document
+    //  examplesFiles = [ ... ] list of files used in the examples document
+    //  cleanFiles = [ ... ]: list of files to be removed by the "clean" targets
+    //  cleanDirs = [ ... ]: list of directories to be removed by the "clean" targets
+    //  latexFlags = [ ... ]: list of LaTeX flags
+}
+
+// Typical task to generate images from PlantUML.
+// By convention the task name is "images.whatever", but it can really be
+// anything you like. Gradle will find these tasks by class name if need be.
+//
+// By default this includes all files matching *.pu, *.puml, or *.plantuml.
+// You can ADD files, e.g., include "foo.uml", "*.pml".
+// You can EXCLUDE files, e.g., exclude "bar.pu", "*.plantuml".
+// You can REPLACE the defaults, e.g., setIncludes(["foo.uml", "*.pml"]).
+// (There is also a setExcludes() but that defaults to empty anyway.)
+// Note that the argument is a list value.
+//
+// Other options:
+//  outputFormat can be one of "pdf", "png", or "svg"
+//  add "salt = true" if there are Salt diagrams
+//  sourceDir and outputDir default to lecture.imageDir but can be overidden
+def pu2pdf = tasks.register("images.plantuml2pdf", nz.stanger.lecture.GenerateImageFromPlantumlTask) {
+    outputFormat = "pdf"
+    description = "Generate PDF from PlantUML."
+
+    // Uncomment the following line if there are any Salt diagrams.
+    // salt = true
+}
+
+// Typical task to generate images from SVG. The name is again arbitrary.
+// By default this includes all files matching *.svg, You can include and
+// exclude as outlined above.
+//
+// Other options:
+//  outputFormat can be one of "pdf" or "png"
+def svg2pdf = tasks.register("images.svg2pdf", nz.stanger.lecture.GenerateImageFromSvgTask) {
+    outputFormat = "pdf"
+    description = "Generate PDF from SVG."
+
+    // If you have multiple image tasks, you have to specify their order to
+    // avoid "implicit dependency" errors. It usually doesn't matter what
+    // order they run in, but the order must be specified.
+    // mustRunAfter pu2pdf
+}