diff --git a/R/addin.R b/R/addin.R
index 1acfd18..612053a 100644
--- a/R/addin.R
+++ b/R/addin.R
@@ -18,13 +18,6 @@ addin_insertReturn <- function() {
   rstudioapi::insertText("%<>% ")
 }
 
-#' @export
-addin_selectWord <- function() {
-  r = rstudioapi::getActiveDocumentContext()
-  browser()
-  print(r)
-}
-
 # fix new line ending in windows system
 # If content is empty, not write
 #' @import clipr
@@ -55,7 +48,6 @@ addin_cutLines <- function() {
 #' @rdname addin_cutLines
 #' @export
 addin_copyLines <- function(output = FALSE){
-    # info <- getSourceEditorContext()
     info <- getActiveDocumentContext()
     
     # set ranges
@@ -75,6 +67,33 @@ addin_copyLines <- function(output = FALSE){
     if (output) return(info)
 }
 
+#' @export
+addin_selectWord <- function() {
+    info = rstudioapi::getActiveDocumentContext()
+    rng <- info$selection[[1]]$range
+    
+    row = rng$start[1]
+    col = rng$start[2]
+    nline <- rng$end[1] - rng$start[1] + 1
+    nchar <- rng$end[2] - rng$start[2] + 1
+
+    # str_post = str_extract(row, glue("(?<=.{{col}})\\w+"))
+    tryCatch({
+        str = info$contents[row]
+        pos = str_locate_all(str, "[\\w\\.]+") %>% 
+            .[start <= col & end >= col, ]
+
+        rng$start[2] = pos$start
+        rng$end[2] = pos$end + 1
+        info$selection[[1]]$range <- rng
+        info$selection[[1]]$text <- info$contents[rng$start[1]]
+
+        rstudioapi::setSelectionRanges(rng, info$id)
+    }, error = function(e) {
+        message(sprintf('%s', e$message))
+    })
+}
+
 #' blind shortcuts to rstudio addin
 #' @export
 key_blind <- function(){
@@ -85,12 +104,12 @@ key_blind <- function(){
     
     if (!dir.exists(indir)) dir.create(indir, recursive = TRUE)
     if (!file.exists(file_addin)) writeLines("{}", file_addin)
-
+    
     options_addin <- list(
         "Ipaper::addin_copyLines"      = "Alt+C",
-        "Ipaper::addin_cutLines"       = "Alt+X",
+        "Ipaper::addin_cutLines"       = "Ctrl+X",
         "Ipaper::addin_insertDo"       = "Ctrl+Alt+D",
-        "Ipaper::addin_selectWord"     = "Alt+D",
+        "Ipaper::addin_selectWord"     = "Ctrl+D",
         "Ipaper::addin_insertIn"       = "Ctrl+Shift+I",
         "Ipaper::addin_insertReturn"   = "Ctrl+Shift+,",
         "Ipaper::smerge"         = "Ctrl+Shift+G", 
diff --git a/R/file_name.R b/R/file_name.R
index 070cddd..0dc0f9b 100644
--- a/R/file_name.R
+++ b/R/file_name.R
@@ -3,11 +3,16 @@ str_extract <- function(x, pattern) {
     substr(x, ans, ans + attr(ans, "match.length"))
 }
 
-str_locate_all <- function(x, pattern) {
+str_locate_all.vec <- function(x, pattern) {
     ans <- gregexpr(pattern, x, perl = TRUE)[[1]]
     ans
 }
 
+str_locate_all <- function(x, pattern) {
+    ans <- gregexpr(pattern, x, perl = TRUE)[[1]]
+    data.table(I = seq_along(ans), start = ans, end = attr(ans, "match.length") + ans - 1)
+}
+
 #' @export
 #' @rdname file_name
 file_ext <- function(file) {
@@ -26,7 +31,7 @@ file_ext <- function(file) {
 #' @export
 file_name <- function(file) {
     file  <- basename(file)
-    pos   <- str_locate_all(file, "\\.")
+    pos   <- str_locate_all.vec(file, "\\.")
     pos   <- pos[[length(pos)]]
     # I_dot <- pos[nrow(pos), 1]
     # no dot
diff --git a/R/tools_plot.R b/R/tools_plot.R
new file mode 100644
index 0000000..1aa8aec
--- /dev/null
+++ b/R/tools_plot.R
@@ -0,0 +1,19 @@
+
+add_gridLine <- function(dates, col = "grey60", lty = 3, ...) {
+    years <- year(dates)
+    date_beg <- ymd( min(years) *1e4 + 0101 )
+    date_end <- ymd( max(years) *1e4 + 0101 )
+    
+    t_grids  <- seq.Date(date_beg, date_end, by = "year")
+    abline(v = t_grids, col = col, lty = lty, ...)
+}
+
+make_dt <- function(..., ncol = 3) {
+    x <- list(...)
+    n <- length(x)
+    nrow <- floor(n / ncol)
+    lapply(1:nrow, function(i) {
+        ind <- seq((i - 1) * ncol + 1, i * ncol)
+        x[ind] %>% as.data.table()
+    }) %>% do.call(rbind, .)
+}
diff --git a/README.md b/README.md
index 886c362..06fd8c5 100644
--- a/README.md
+++ b/README.md
@@ -27,11 +27,19 @@ install.packages("../Ipaper_0.1.5.9000.tar.gz", repos = NULL, type = "source", d
 
 | Description                                       | Shortcut     |
 |---------------------------------------------------|--------------|
-| copy lines at the cursor position (sublime style) | Alt+c        |
-| clip lines at the cursor position                 | Alt+x        |
+| copy lines at the cursor position (sublime style) | Alt+C        |
+| clip lines at the cursor position                 | Ctrl+X       |
+| Select word                                       | Ctrl+D       |
 | Insert `%<>%`                                     | Ctrl+Shift+, |
 | Insert `%do% {}`                                  | Ctrl+Shift+D |
 | Insert `%in% {}`                                  | Ctrl+Shift+I |
+| Open in VSCode                                    | Alt+Shift+V  |
+| Open in smerge                                    | Ctrl+Shift+G |
+| Open in subl                                      | Alt+Shift+L  |
+
+Note that `VSCode`, `smerge` or `subl` should be in the system path, if you want to use it.
+
+After install, run `Ipaper::key_blind()` to make those shortcuts work.
 
 ### Visualization
 
diff --git a/inst/rstudio/addins.dcf b/inst/rstudio/addins.dcf
index 8a4535f..c3f0c32 100644
--- a/inst/rstudio/addins.dcf
+++ b/inst/rstudio/addins.dcf
@@ -1,24 +1,24 @@
-Name: Insert %in%
+Name: Insert %in% (Ctrl+Shift+I)
 Description: Inserts `%in%` at the cursor position.
 Binding: addin_insertIn
 Interactive: false
 
-Name: Insert %do% {}
+Name: Insert %do% {} (Ctrl+Alt+D)
 Description: Inserts `%do% {}` at the cursor position.
 Binding: addin_insertDo
 Interactive: false
 
-Name: Insert %<>%
+Name: Insert %<>% (Ctrl+Shift+,)
 Description: Inserts `%<>%` at the cursor position.
 Binding: addin_insertReturn
 Interactive: false
 
-Name: Copy lines
+Name: Copy lines (Alt+C)
 Description: Copy lines at the cursor position.
 Binding: addin_copyLines
 Interactive: false
 
-Name: Cut lines
+Name: Cut lines (Ctrl+X)
 Description: Cut lines at the cursor position.
 Binding: addin_cutLines
 Interactive: false
@@ -28,17 +28,17 @@ Description: Open current working project in smerge
 Binding: smerge
 Interactive: false
 
-Name: Open in subl
+Name: Open in subl (Alt+Shift+L)
 Description: Open current working directory in sublime
 Binding: subl
 Interactive: false
 
-Name: Open in VSCode
+Name: Open in VSCode (Alt+Shift+V)
 Description: Open current working directory in VSCode
 Binding: code
 Interactive: false
 
-Name: Select word
+Name: Select word (Ctrl+D)
 Description: Select word
 Binding: addin_selectWord
 Interactive: false