diff --git a/README.md b/README.md
index dfbd3a9..6811c66 100644
--- a/README.md
+++ b/README.md
@@ -74,10 +74,17 @@ bindash sketch --outfname=genomeA.sketch genomeA.fasta
 bindash sketch --outfname=genomeB.sketch genomeB.fasta
 bindash dist genomeA.sketch genomeB.sketch # print to stdout
 
-### or if you have a list of genomes, one genome per line in a list file.
+### or if you have a list of genomes, one genome per line in a list file. All versus all
 ls *.fasta > name.txt
 bindash sketch --listfname=name.txt --outfname=genome_sketch
 bindash dist --outfname=dist.txt genome_sketch
+
+### query against database genomes
+ls *_query.fasta > query.txt
+ls *_db.fasta > db.txt
+bindash sketch --listfname=query.txt --outfname=genome_query_sketch
+bindash sketch --listfname=db.txt --outfname=genome_db_sketch
+bindash dist --outfname=dist.txt genome_query_sketch genome_db_sketch
 ```
 
 The output of "bindash dist" consists of several lines. 
diff --git a/src/commands.hpp b/src/commands.hpp
index b9c2cad..3b053d5 100644
--- a/src/commands.hpp
+++ b/src/commands.hpp
@@ -76,7 +76,7 @@ class Sketchargs {
 	std::string listfname = "-";
 	size_t kmerlen = 16;
 	int minhashtype = 2;
-	int dens = 1;
+	int dens = 2;
 	size_t nthreads = std::thread::hardware_concurrency();
 	std::string outfname = "";
 	uint64_t randseed = 41; //0x3355557799AACCULL;