diff --git a/R/graph.R b/R/graph.R
index b332905..e3e353e 100644
--- a/R/graph.R
+++ b/R/graph.R
@@ -347,9 +347,12 @@ sg_drop_edges <- function(sg, data, ids, delay, cumsum = TRUE, refresh = FALSE)
 #' 
 #' sigmajs() %>% 
 #'   sg_force_start() %>% 
-#'   sg_read_nodes(nodes, id, label, color, size, delay = "batch") %>% 
-#'   sg_read_edges(edges, id, source, target, delay = "batch") %>% 
-#'   sg_read_exec()
+#'   sg_read_nodes(nodes, id, label, color, size, delay = batch) %>% 
+#'   sg_read_edges(edges, id, source, target, delay = batch) %>% 
+#' 	 sg_force_stop(4000) %>% 
+#'   sg_read_exec() %>% 
+#' 	 sg_button("read_exec", "Add nodes & edges")
+#' 
 #' @name read-static
 #' @export
 sg_read_nodes <- function(sg, data, ..., delay){
@@ -357,6 +360,8 @@ sg_read_nodes <- function(sg, data, ..., delay){
   if (missing(sg) || missing(data) || missing(delay))
     stop("must pass sg, data, and delay", call. = FALSE)
 
+	delay <- deparse(substitute(delay))
+
   .test_sg(sg)
 
 	nodes <- data %>% 
@@ -379,6 +384,8 @@ sg_read_edges <- function(sg, data, ..., delay){
 
   .test_sg(sg)
 
+	delay <- deparse(substitute(delay))
+
 	edges <- data %>% 
 		.build_data(..., delay = delay) %>%
 		.check_ids() %>%
diff --git a/R/graph_proxies.R b/R/graph_proxies.R
index 5e847c2..706e5fd 100644
--- a/R/graph_proxies.R
+++ b/R/graph_proxies.R
@@ -645,9 +645,10 @@ sg_read_exec_p <- function(proxy){
 #' 
 #' 		sigmajsProxy("sg") %>% 
 #'      sg_force_start_p() %>% 
-#' 			sg_read_delay_nodes_p(nodes, id, color, label, size, delay = "batch") %>% 
-#' 			sg_read_delay_edges_p(edges, id, source, target, delay = "batch") %>% 
-#' 			sg_read_delay_exec_p() 
+#' 			sg_read_delay_nodes_p(nodes, id, color, label, size, delay = batch) %>% 
+#' 			sg_read_delay_edges_p(edges, id, source, target, delay = batch) %>% 
+#' 			sg_read_delay_exec_p()  %>% 
+#' 			sg_force_stop_p()
 #' 	})
 #' 
 #' }
@@ -660,8 +661,10 @@ sg_read_delay_nodes_p <- function(proxy, data, ..., delay){
   
   .test_proxy(proxy)
 
-	if(missing(delay))
-		stop("missing delay", call. = FALSE)
+	if(missing(delay) || missing(data))
+		stop("missing data or delay", call. = FALSE)
+
+	delay <- deparse(substitute(delay))
 
 	# build data
 	nodes <- data %>% 
@@ -681,6 +684,11 @@ sg_read_delay_nodes_p <- function(proxy, data, ..., delay){
 sg_read_delay_edges_p <- function(proxy, data, ..., delay){
   .test_proxy(proxy)
 
+	if(missing(delay) || missing(data))
+		stop("missing data or delay", call. = FALSE)
+
+	delay <- deparse(substitute(delay))
+
 	# build data
 	edges <- data %>% 
 		.build_data(..., delay = delay) %>%
diff --git a/man/read-batch.Rd b/man/read-batch.Rd
index a239a44..a82d197 100644
--- a/man/read-batch.Rd
+++ b/man/read-batch.Rd
@@ -68,9 +68,10 @@ server <- function(input, output, session){
 
 		sigmajsProxy("sg") \%>\% 
      sg_force_start_p() \%>\% 
-			sg_read_delay_nodes_p(nodes, id, color, label, size, delay = "batch") \%>\% 
-			sg_read_delay_edges_p(edges, id, source, target, delay = "batch") \%>\% 
-			sg_read_delay_exec_p() 
+			sg_read_delay_nodes_p(nodes, id, color, label, size, delay = batch) \%>\% 
+			sg_read_delay_edges_p(edges, id, source, target, delay = batch) \%>\% 
+			sg_read_delay_exec_p()  \%>\% 
+			sg_force_stop_p()
 	})
 
 }
diff --git a/man/read-static.Rd b/man/read-static.Rd
index d6a33c6..ad9fd86 100644
--- a/man/read-static.Rd
+++ b/man/read-static.Rd
@@ -53,7 +53,10 @@ edges <- data.frame(
 
 sigmajs() \%>\% 
   sg_force_start() \%>\% 
-  sg_read_nodes(nodes, id, label, color, size, delay = "batch") \%>\% 
-  sg_read_edges(edges, id, source, target, delay = "batch") \%>\% 
-  sg_read_exec()
+  sg_read_nodes(nodes, id, label, color, size, delay = batch) \%>\% 
+  sg_read_edges(edges, id, source, target, delay = batch) \%>\% 
+	 sg_force_stop(4000) \%>\% 
+  sg_read_exec() \%>\% 
+	 sg_button("read_exec", "Add nodes & edges")
+
 }
diff --git a/vignettes/buttons.Rmd b/vignettes/buttons.Rmd
index 2ef1c0d..e56ccaf 100644
--- a/vignettes/buttons.Rmd
+++ b/vignettes/buttons.Rmd
@@ -21,6 +21,30 @@ library(sigmajs)
 
 `sigmajs` lets you add buttons to trigger events, *in static documents*.
 
+## All events
+
+Events that can be triggered via a button (corresponding function name minus `sg_`):
+
+* `force_start`
+* `force_stop`
+* `noverlap`
+* `drag_nodes`
+* `relative_size`
+* `add_nodes`
+* `add_edges`
+* `add_nodes_edges`
+* `drop_nodes`
+* `drop_edges`
+* `animate`
+* `export_svg`
+* `export_img`
+* `progress`
+* `read_exec`
+
+You will examples of the above scattered throughout the documentation.
+
+## Download
+
 A button to export the graph as SVG, not that you can export to an image (png, jpeg, gif or tiff).
 
 ```{r}
@@ -56,7 +80,9 @@ sigmajs() %>%
   )
 ```
 
-Since version `1.1.2` you can add multiple buttons.
+## Multiple buttons
+
+Since version `1.1.2` you can add multiple buttons, and a single button can trigger multiple events.
 
 ```{r}
 # initial nodes
@@ -78,22 +104,3 @@ sigmajs() %>%
   sg_button(c("add_nodes", "progress"), "add", tag = tags$a, position = "bottom") %>% 
   sg_button("force_start", "force", tag = tags$a, position = "bottom")
 ```
-
-Events that can be triggered via a button (corresponding function name minus `sg_`):
-
-* `force_start`
-* `force_stop`
-* `noverlap`
-* `drag_nodes`
-* `relative_size`
-* `add_nodes`
-* `add_edges`
-* `add_nodes_edges`
-* `drop_nodes`
-* `drop_edges`
-* `animate`
-* `export_svg`
-* `export_img`
-* `progress`
-
-You will examples of the above scattered throughout the documentation.
\ No newline at end of file