diff --git a/shell/completion.bash b/shell/completion.bash
index ad778d12..6ef03860 100644
--- a/shell/completion.bash
+++ b/shell/completion.bash
@@ -215,7 +215,7 @@ _fzf_complete_kill() {
 
   local selected fzf
   fzf="$(__fzfcmd_complete)"
-  selected=$(ps -ef | sed 1d | FZF_DEFAULT_OPTS="$FZF_DEFAULT_OPTS --preview 'echo {}' --preview-window down:3:wrap --min-height 15 $FZF_COMPLETION_OPTS" $fzf -m | awk '{print $2}' | tr '\n' ' ')
+  selected=$(ps -ef | sed 1d | FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-50%} --min-height 15 --reverse $FZF_DEFAULT_OPTS --preview 'echo {}' --preview-window down:3:wrap $FZF_COMPLETION_OPTS" $fzf -m | awk '{print $2}' | tr '\n' ' ')
   printf '\e[5n'
 
   if [ -n "$selected" ]; then
diff --git a/shell/completion.zsh b/shell/completion.zsh
index 850aab63..9b9dba3e 100644
--- a/shell/completion.zsh
+++ b/shell/completion.zsh
@@ -163,7 +163,7 @@ fzf-completion() {
   # Kill completion (do not require trigger sequence)
   if [ $cmd = kill -a ${LBUFFER[-1]} = ' ' ]; then
     fzf="$(__fzfcmd_complete)"
-    matches=$(ps -ef | sed 1d | FZF_DEFAULT_OPTS="$FZF_DEFAULT_OPTS --preview 'echo {}' --preview-window down:3:wrap --min-height 15 $FZF_COMPLETION_OPTS" ${=fzf} -m | awk '{print $2}' | tr '\n' ' ')
+    matches=$(ps -ef | sed 1d | FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-50%} --min-height 15 --reverse $FZF_DEFAULT_OPTS --preview 'echo {}' --preview-window down:3:wrap $FZF_COMPLETION_OPTS" ${=fzf} -m | awk '{print $2}' | tr '\n' ' ')
     if [ -n "$matches" ]; then
       LBUFFER="$LBUFFER$matches"
     fi