Improve seed and loop controls

README.md

@@ -91,6 +91,11 @@ Basic loop wiring:
    If omitted, the end node uses the start collector internally.
 5. After the loop finishes, use `For Loop End.collected` as the combined output.
 
+`For Loop Start.skip` skips the first N iterations while keeping the index
+stable. For example, `total=10` and `skip=1` runs indexes `1..9`; `skip=5` runs
+indexes `5..9`. This is useful when you want to resume a loop without changing
+index-derived seeds or row numbers.
+
 `collection_mode` controls how values are stored:
 
 - `auto_batch`: concatenates image tensors or latent samples when possible,
@@ -205,7 +210,11 @@ expression, and composition can still change while the saved character
 appearance remains stable.
 
 `SxCP Seed Control` outputs `seed_config`, which can be connected to the prompt
-builder's optional `seed_config` input.
+builder's optional `seed_config` input. When an axis is set to `random`, the
+visible seed value is materialized before the workflow queues, and that exact
+value is used for the queued prompt. The mode returns to `random` after queueing
+so the next run can reroll. Use `Lock Random Seeds Now` on the node when you want
+to convert the current random axes into fixed reusable seeds.
 
 `SxCP Seed Locker` is the fast version for iteration. Set `base_seed` to a seed
 you like, choose one `reroll_axis`, and connect its `seed_config`. All other
@@ -680,7 +689,10 @@ axis has its own mode plus seed value:
 - `follow_main`: always follows the final generator's main `seed` input and
   ignores the entered axis seed.
 - `fixed`: always uses the entered axis seed.
-- `random`: generates a fresh axis seed when the node runs.
+- `random`: generates a fresh visible axis seed when the workflow queues.
+
+The `Lock Random Seeds Now` button turns every current `random` axis into a
+visible concrete seed and switches those axes to `fixed`.
 
 For normal prompt iteration, `SxCP Seed Locker` is usually simpler: